Diabetes in dogs and cats in India: two different diseases, the insulin sold here, and why cats can come off it

Signs of Diabetes mellitus in dogs and cats

The 10 signs to watch for are listed below. Any one of them is a reason to consult your nearby vet; none of them is a diagnosis.

• Drinking far more water than usual, and refilling the bowl more often
• Urinating more, larger puddles, or a suddenly heavier litter tray
• Losing weight while eating normally or eating more
• A ravenous appetite that does not put weight back on
• Going off food, which happens in up to half of diabetic cats
• A dull, dry or unkempt coat, and general flatness
• Cloudy eyes in a dog, sometimes both within weeks
• Walking with the hocks dropped towards the floor, in a cat
• Repeated urinary, skin or gum infections that keep coming back
• Sweet-smelling or acetone-smelling breath, with vomiting

Breeds on this site that document this condition

Ten cards, seven dogs and three cats, and two of them are at the protective end on purpose. Read the denominators rather than the ranks, because the four studies behind these figures measured four different things in four countries: Norwegian laboratory submissions against two comparator groups, a UK voluntary diabetes register against a primary-care reference population, Australian primary-care records for one year, and Swedish insurance claims. A breed can rank first in one and be absent from another simply because fewer than ten of its cases were recorded, which is why the Boxer, the Chihuahua and the Bernese Mountain Dog were excluded from the Norwegian ranking altogether. None of these populations is Indian.

Two different diseases share one word, and the difference decides everything

Canine diabetes and feline diabetes are not the same illness. The Merck Veterinary Manual states the difference in one line: remission is possible in cats, while in dogs the disease, in the absence of a predisposing disease, is generally lifelong. An owner who reads a dog-centred page about a cat has been told the wrong thing about the only decision that is time-limited.

A diabetic dog has lost the cells that make insulin, and they do not come back. Canine diabetes is essentially insulin-dependent, so injected insulin is the treatment and it does not stop. Cornell puts the standing message for owners plainly, that insulin therapy is a mainstay of treatment and that many dogs diagnosed early and monitored carefully live full, active lives.

A diabetic cat usually has something much closer to human type 2 diabetes. The 2025 iCatCare consensus guidelines assume feline diabetes has a similar cause to human type 2 diabetes in 75 to 80 percent of cases, with the other 20 to 25 percent secondary to hypersomatotropism, an excess of growth hormone. Type 2 in a cat is a combination of partial beta cell dysfunction, beta cell loss and insulin resistance, and insulin resistance is the part that weight loss can reverse.

The mechanism inside the feline pancreas is different too. Cats with diabetes usually carry degenerative lesions confined to the islets of Langerhans while the rest of the pancreas looks normal, and the commonest lesion is amyloid deposited in the islets, arising from islet-associated polypeptide that cats cannot process normally. That is a slow, partial loss rather than the wholesale destruction a dog suffers, which is why a proportion of cats recover enough function to stop injections.

In dogs there is a reproductive route into diabetes that does not exist in cats. In dogs, but not cats, progesterone causes mammary tissue to release growth hormone, producing hyperglycaemia and insulin resistance, so pregnancy and dioestrus predispose a bitch to diabetes. The clearest demonstration is a Swedish study of 63 diabetic elkhounds and 26 healthy controls in which every single diabetic dog was an intact female, 7 of them, or 11 percent, pregnant at diagnosis.

That study also shows the one canine situation where the disease can reverse. First clinical signs appeared a median of 30 days after oestrus, with an interquartile range of 3 to 45 days, and 46 percent of the dogs that underwent ovariohysterectomy recovered from the diabetes. The chance of recovery fell with a higher glucose at diagnosis and with every extra week between diagnosis and surgery, so the authors concluded that immediate surgery improves the prognosis.

One sentence should decide how you read the rest of this page. If your animal is a cat, the remission section below is the most valuable thing here and it is time-limited. If your animal is a dog, the sections on insulin, glucose curves and cataracts are where the decisions are.

The vocabulary matters as well, because the words get used loosely. Diabetes mellitus is the sugar disease this page is about. Diabetes insipidus is an unrelated water-handling disorder that produces the same thirst and the same volume of urine with a normal blood glucose, and it is one of the things that gets mistaken for diabetes in dogs. Anyone using the single word diabetes in a clinic is talking about diabetes mellitus unless they say otherwise.

How common diabetes is, and which dogs and cats get it

Diabetes is uncommon in absolute terms and well measured in three countries. In 480,469 UK dogs aged three years and over at 430 primary-care clinics, 409 new and 863 pre-existing cases were identified in 2016, an apparent annual prevalence of 0.26 percent with a 95 percent confidence interval of 0.25 to 0.28 percent, and an annual incidence risk of 0.09 percent.

Three national datasets agree on the order of magnitude and disagree at the edges, which is what independent measurement looks like. Australian primary care put prevalence at 0.36 percent, with a 95 percent confidence interval of 0.33 to 0.39 percent, among 134,329 dogs at 152 clinics in 2017. Swedish insurance data gave an incidence of 13 cases per 10,000 dog-years at risk across 182,087 insured dogs aged 5 to 12, accounting for 652,898 dog-years. Cornell's owner-facing summary rounds all of this to the statement that up to 1 percent of all dogs may develop diabetes during their lifetime.

In cats the figures are similar and come from bigger denominators. Among 193,435 cats attending 118 English primary-care practices, 1,128 cases gave a period prevalence of 0.58 percent, with a 95 percent confidence interval of 0.54 to 0.61 percent, which the authors describe as one cat in 200. An earlier UK insured population gave a prevalence of 1 in 230 cats, and a Swedish cohort of 504,688 cats contributing 1,229,699 cat-years at risk gave an overall incidence of 11.6 cases per 10,000 cat-years, with a 95 percent confidence interval of 11.0 to 12.2.

Read one caveat into all of those numbers before you carry them to India. Every denominator above is a British, Australian or Swedish population with veterinary records or insurance claims attached. None of them describes Indian street-adjacent or apartment-kept animals, Indian diets or Indian clinic access, and no Indian equivalent has been published, which the India section below documents with the search behind it.

Age is the strongest single predictor in both species. Swedish dogs were a mean of 8.6 years old at their first diabetes insurance claim, and 72 percent of the 860 cases were female. In the UK register, median age at diagnosis in the adult-onset group that was not an entire female was 9.2 years, with an interquartile range of 7.43 to 10.9 years and a full range of 3.0 to 16.7 years. In cats, incidence is close to zero in young animals, starts rising at about 6 years of age and peaks at 13.

Sex works in opposite directions in the two species, and that is a genuinely useful thing to know. Female dogs carry the higher risk, with entire females at an odds ratio of 3.03, 95 percent confidence interval 1.69 to 5.44, against entire males in UK primary care. Male cats carry the higher risk, at 15.4 cases per 10,000 cat-years against 7.6 in females, roughly double.

The risk factors an owner can actually change

Weight is the lever in cats and it has a measured effect size. Cornell states that obese cats are up to four times more likely to develop diabetes than ideal-weight cats. Odds of diabetes rose with every bodyweight category above 4 kg in the 193,435-cat English study, and rose as cats aged beyond 6 years. A Swedish case-control study of 396 diabetic cats and 1,670 controls found indoor confinement, being a greedy eater and being overweight all associated with increased risk, and, in cats their owners judged to be a normal weight, eating predominantly dry food carried an odds ratio of 3.8 with a 95 percent confidence interval of 1.3 to 11.2.

That last finding deserves its own sentence because it is counter-intuitive and the authors flagged it themselves. The dry-food association appeared in cats the owners considered normal weight, and the paper says the finding warrants further attention rather than treating it as settled. Our guide to cat diet chart India and the sibling page on obesity in dogs and cats carry the weight-control side of this.

Steroids are the lever in dogs and the effect is large. Dogs diagnosed with diabetes had over four times the odds of glucocorticoid exposure in the six weeks before diagnosis, an odds ratio of 4.07 with a 95 percent confidence interval of 2.41 to 6.89, in a case-control study of 565 cases and 2,179 controls nested in UK primary care. The same team's earlier cohort found previous glucocorticoid treatment associated with increased odds of diagnosis at 2.19, 95 percent confidence interval 1.02 to 4.70. Steroid courses are common in Indian practice for skin and ear disease, which makes this the most transferable risk factor on the page.

Concurrent disease matters as much as lifestyle. Documented obesity, pancreatitis and hyperadrenocorticism all raised the odds of a diabetes diagnosis in UK dogs, and Cornell adds that dogs with hypothyroidism carry a slightly higher risk of becoming diabetic. Our page on hypothyroidism in dogs sets out that disease on its own terms.

One canine form breaks every rule above, and it is the reason the Keeshond appears in human diabetes journals. A line of non-obese purebred Keeshond dogs was characterised with inherited, early-onset, insulin-requiring diabetes that began between 2 and 6 months of age, with cataracts, ketosis and hyperglycaemia, and with the pancreatic islet B cells absent on immunocytochemistry while the A cells remained. That is a juvenile disease in puppies rather than the middle-aged illness this page otherwise describes, and it is rare. Diabetes in cats has no equivalent juvenile form, because the feline disease is a disease of ageing and of weight.

The signs worth acting on, and the day you should not wait

The four classic signs are drinking more, urinating more, eating more and losing weight, and they appear together because of one mechanism. Once blood glucose passes the kidney's reabsorption limit, sugar spills into the urine and drags water with it, so the animal urinates more and then drinks to keep up Cornell University College of Veterinary….

The threshold that produces those signs is a number, and it differs by species. The renal threshold for glucose is approximately 180 mg/dL in dogs and approximately 280 mg/dL in cats. A normal fasted blood glucose in either species is 75 to 120 mg/dL, and Cornell gives 80 to 120 mg/dL for healthy dogs, noting that glucose becomes detectable in urine once blood levels go over 200.

The sign owners most often get wrong is the appetite. The textbook picture is a ravenous animal losing weight, and it is real, but some dogs and up to 50 percent of cats with diabetes have a decreased appetite instead. A cat that has gone off its food and is still losing weight is not thereby ruled out.

Two species-specific signs are worth learning by name because they are easy to describe to a vet. In dogs the eyes cloud, often both of them and often fast. In cats, uncontrolled diabetes can damage the nerves of the hind limbs and produce a plantigrade stance, in which the cat walks or stands with its hocks on or close to the ground, which Cornell notes is not painful and often resolves with treatment.

Repeated infection is the quiet fourth sign. Diabetic animals have decreased resistance to bacterial and fungal infection and often develop chronic or recurrent cystitis, prostatitis, bronchopneumonia and dermatitis, because glucose in the tissues impairs neutrophil function. A dog or cat on its third urinary infection of the year deserves a glucose reading, not a third antibiotic.

Do not let the Indian summer explain the thirst away. Every dog and cat in a Chennai or Delhi April drinks more, which makes the single most useful early warning the easiest one to dismiss. Track litres a day rather than impressions, set the baseline in a cool month, and take a sustained rise to a veterinarian for a urine test rather than waiting for the weight to come off. Our guides to heat safety for cats in India and senior dog care in India cover the normal seasonal swing this has to be read against.

The window matters in a way no ranking page states. Up to 25 percent of animals diagnosed with diabetes are euthanised on day one of diagnosis, for reasons the Merck manual says can often be mitigated with education about the disease and about the goals of treatment. An owner who arrives already knowing that the disease is treatable, that a cat may come off insulin entirely and that the injections are well tolerated is a different owner in that consulting room.

What could be mistaken for diabetes in dogs and cats

Several conditions produce the same heavy drinking, heavy urination and weight loss, and two of them can even produce sugar in the urine or a high blood glucose without the animal being diabetic. The differential is worth knowing because it decides which blood test the clinic runs first.

Stress hyperglycaemia is the commonest false positive, and it is a cat problem. Cats can develop a short-term rise in blood glucose in response to the stress of a clinic visit, which Cornell describes plainly, and the 2025 consensus guidelines warn that it can be of any magnitude, so a big number does not rule it out Taylor S, Cannon M, Church D, Fleeman L. In stress hyperglycaemia the serum fructosamine concentration is normal, which is exactly why that test exists.

Cushing's disease produces the same thirst and can cause the diabetes as well as imitate it. Hyperadrenocorticism raises cortisol, cortisol antagonises insulin, and dogs with spontaneous hyperadrenocarticism or long courses of glucocorticoids or progestins are among those in whom insulin resistance occurs. It appeared as a concurrent condition raising the odds of a diabetes diagnosis in UK primary care, and it was recorded as a reason for euthanasia in 7 of 233 diabetic UK dogs. Cornell lists a dog battling hyperadrenocorticism among those more likely to have problems.

Kidney disease is the commonest mimic in an older cat. It produces the same increase in thirst and urine volume by a different route, and Cornell's feline page names chronic kidney disease among the diseases a veterinarian will test for while working up these signs, alongside a urinary tract infection, pancreatitis and hyperthyroidism. Our page on chronic kidney disease in cats sets out how that one is separated.

Hyperthyroidism is the other older-cat imitator, and it is the one that produces the most convincing picture of all, because a hyperthyroid cat eats ravenously and loses weight while drinking more. Cornell lists it among the conditions to rule out when working up these signs in a cat. The sibling page on hyperthyroidism in cats covers it.

Two further mimics belong on the list. Diabetes insipidus produces polyuria and polydipsia with a normal blood glucose, so it looks identical from the sofa and separates instantly on a blood test. And in an unspayed bitch, pyometra presents with heavy drinking and flatness within four months of a season, which is a surgical emergency rather than an endocrine disease; our page on pyometra in dogs and cats carries the Indian denominators for it.

The practical version of that table is short. A dipstick that finds sugar in the urine is a reason to measure blood glucose, not a diagnosis, and a single high blood glucose in a frightened cat is a reason to measure fructosamine, not a reason to start insulin.

How a veterinarian confirms it

Diagnosis rests on three findings together, which are persistent hyperglycaemia, glucosuria and clinical signs that match. No single blood reading makes the diagnosis in a cat, and the guidelines say so.

One high glucose is not a diagnosis. In cats, stress-induced hyperglycaemia is common enough that multiple blood and urine samples may be required to confirm the diagnosis, and measurement of serum fructosamine assists in separating the two. The 2025 consensus guidelines add that there are cases where diabetes and stress hyperglycaemia cannot be distinguished at all, in which case home blood glucose measurement, continuous glucose monitoring and dipstick testing of urine collected at home are useful, and periodic re-evaluation is recommended if the doubt persists.

Fructosamine is the test that makes the difference, and it measures a window rather than a moment. Serum fructosamine reflects glycaemia over around the preceding 7 to 10 days, depending on the size of the glucose swings and the rate of protein turnover. Cornell describes it for owners as a rough average of the cat's blood glucose over the last two weeks, unaffected by stress hyperglycaemia. Its main advantage is also its main limitation, because short hypoglycaemic episodes are not captured, so a high result cannot be used to rule out episodic lows.

The Norwegian breed study is a useful illustration of how seriously that test is taken as a case definition. Ringstad and colleagues defined a diabetes case as a serum fructosamine above 315 micromol per litre in samples submitted to the national veterinary clinical pathology laboratory between 2001 and 2018.

A urine dipstick is the cheapest first step and it is available in every Indian pharmacy. Once blood glucose goes over about 200 mg/dL in a dog, glucose becomes detectable in the urine. The 2025 guidelines note that urine dipsticks may be applied directly to urine, or to the liquid obtained by adding water to urine-soaked cat litter, which is a genuinely practical trick for a cat that will not cooperate.

The rest of the work-up is about what else is going on. The commonest biochemical abnormalities alongside the high glucose are raised cholesterol and raised liver enzyme activity, and a full chemistry panel matters at diagnosis for a specific prognostic reason: Cornell notes that dogs with high blood phosphate at diagnosis tend to have a slightly less positive prognosis, and uses that to argue for a complete panel on day one.

In cats, one more test changes the treatment plan and it is under-requested. Hypersomatotropism, an excess of growth hormone, is thought to occur in between 1 in 3 and 1 in 5 cats with diabetes and is the leading cause of clinically relevant insulin-resistant diabetes in the species. Most affected cats, 75 percent of them, have no physical change that distinguishes them from an ordinary diabetic cat on examination. Screening is best done by measuring serum insulin-like growth factor 1, which with a validated assay has a minimum 95 percent positive predictive value for the condition at a cut-off of 1000 ng/ml.

That matters because it is one of the few situations in which the word cure is defensible. In cats whose insulin resistance comes from hypersomatotropism, addressing the underlying cause might lead to cure of the diabetes, and hypophysectomy achieves diabetic remission in 71 to 92 percent of cases with a reported mortality rate of 4 to 15 percent. Neither the surgery nor a validated insulin-like growth factor assay is routinely available in India, which is worth knowing before a clinic is asked for it.

What the treatment is, in general terms

Treatment is a combination of insulin, diet and weight management in both species, and dietary management alone will not control the disease, so insulin is where treatment starts. This page names drug classes and never a dose, because the dose belongs to the veterinarian who has examined and weighed your animal.

In dogs the insulin is the treatment and there is no oral substitute. Cornell lists two insulins approved for use in dogs, porcine lente insulin sold as Vetsulin and zinc insulin sold as ProZinc, and three used off-label with good results, which are detemir sold as Levemir, glargine sold as Lantus and isophane insulin, known as NPH, sold as Novolin-N and Humulin-N. The Merck manual's summary for clinicians is that lente is the insulin of choice for dogs.

The UK register shows what practice actually settled on. Twice-daily Caninsulin, a 40 IU per millilitre porcine insulin, was the most commonly reported treatment across 1,072 registered dogs, and twice-daily rather than once-daily insulin has become more prevalent since the archive was founded in 1999. The United Kingdom currently licenses two veterinary insulin products, Caninsulin from MSD Animal Health, a mixed soluble and lente form of porcine zinc insulin, and ProZinc from Boehringer Ingelheim, a longer-acting protamine zinc recombinant human insulin.

In cats the drug list is different and it changed in 2023. Long-acting insulins, glargine or protamine zinc insulin, are preferred for cats, and Cornell names lente insulin, ProZinc and glargine as the options an owner will be offered. In 2023 a class of once-daily oral medicines, the sodium-glucose cotransporter-2 inhibitors, was approved for feline diabetes; they lower blood glucose by increasing the amount the kidneys excrete, and studies have shown them to be more than 80 percent effective at improving blood glucose control in appropriate patients.

Read the eligibility line on those tablets carefully, because it is narrow. They rely on the cat making at least some insulin of its own, and they are approved for newly diagnosed, otherwise healthy cats that have not previously been treated with any injectable insulin. The 2026 AAHA guidelines for cats devote sections to how to treat and monitor cats receiving these drugs and to diagnosing and treating diabetic ketoacidosis in them, which is the risk that makes the monitoring non-negotiable.

• Insulin is the mainstay in both species and is injected under the skin, usually about every 12 hours in cats.
• Diet is a treatment rather than a routine, and a low-carbohydrate diet has been shown to improve blood sugar regulation in diabetic cats.
• Weight loss in an overweight or obese diabetic cat is essential to improve outcomes, and the dietary plan should be designed to achieve it.
• Oral SGLT2 inhibitors are an option for a specific, newly diagnosed subset of cats and are not a substitute for insulin in a dog.
• Spaying an intact diabetic bitch is generally recommended to even out insulin requirements, and in the dioestrus-driven form it can end the disease.

The injections are the part owners fear and the part that turns out fine. Cornell tells dog owners that the needles are a small diameter and very sharp, so most dogs handle the injections well, and that some clinics have owners practise on a piece of fruit first. For cats it says most owners can be taught to give the injections at home quite easily and that cats tolerate them very well.

Two handling rules come straight off Cornell's dog page and both matter more in an Indian kitchen than in a British one. Insulin is sensitive and must be stored carefully, neither too cold nor too hot, and even shaking it too vigorously can harm it, with some insulins needing to be rolled rather than shaken. Never use insulin past its expiry date.

Remission in cats, the rates with their denominators, and why the clock matters

Remission in a diabetic cat means zero requirement for injected insulin for at least four weeks with no clinical signs of diabetes, and it is a defined state rather than a hope. Reported incidence ranges from 11 percent to over 60 percent across studies, which the guideline attributes to how heterogeneous feline diabetes is.

The top of that range comes from a study that says exactly what it did and to how many cats. Fifty-five cats diagnosed with diabetes, whose owners joined an online German owner forum, were managed to a euglycaemia target using home blood glucose monitoring, an ultra-low-carbohydrate diet and the insulin analogue glargine. The overall remission rate was 64 percent.

The number inside that number is the one an Indian owner needs, because it is about timing rather than money. Cats started on the protocol within six months of diagnosis went into remission 84 percent of the time, against 35 percent for cats started more than six months after diagnosis, with a P value below 0.001. Only one mild clinical hypoglycaemic episode occurred across the cohort despite the tight control.

Cornell states the same deadline in the form an owner can act on. If a cat has not entered diabetic remission within the first six months after diagnosis, it will almost certainly require lifelong insulin injections. The same page names older cats, cats that have previously received steroid medications and cats treated with glargine as more likely to go into remission, and then says the most important factor is starting insulin therapy early and monitoring closely.

Remission is not permanent and it is not a cure. The guideline is explicit that remission is by definition a temporary state, that duration runs from weeks to years with a median of 120 to 150 days, and that between 13 and 40 percent of cats relapse, with a second remission generally less likely. The Indian case report puts the biology behind that in one sentence: cats experiencing diabetic remission are not cured, because they have islet cell pathology that potentially predisposes them to a relapse of clinical diabetes.

Cornell's own framing is the same and it is worth quoting because owners routinely hear the opposite. Though there is no cure for feline diabetes, the prognosis for a good quality of life is good with adequate management at home. A cat that is off insulin should still be fed a low-carbohydrate diet and monitored closely, because some will eventually need insulin again.

What actually raises the odds of remission

Early weight loss is the biggest measured lever and the effect size is startling. Effective early weight loss in an overweight or obese diabetic cat is associated with a 15-fold increase in the odds of remission. The guideline's practical framing is a body condition score target of 5 out of 9 and a maximum loss of around 0.5 to 1 percent of bodyweight per week, carefully managed rather than crash-imposed.

Diet is the second lever and the honest version has two halves. Low-carbohydrate diets with medium to high amounts of protein and fat have been associated with an increased likelihood of remission and better glycaemic control, and remission can still be achieved in cats eating higher-carbohydrate diets. The guideline adds a warning that reads as though written for India: pursuing a particular diet at the cost of food intake or of financial pressure on the caregiver should be avoided.

One rule is worth memorising before you need it. The diet of a cat with diabetes should not be altered during a period of reduced appetite. A diabetic cat that has gone off its food needs a veterinarian, not a new brand of food.

A diagnosis of diabetic ketoacidosis is not associated with a decreased chance of diabetic remission. That is a genuinely encouraging fact for an owner whose cat has just spent three days on a drip, and no consumer page carries it.

Remission has to be looked for, because it announces itself as a falling insulin requirement rather than as an event. The guideline describes it being suspected from persistent normal glucose readings or episodes of low glucose on continuous monitoring or home curves, from normal fructosamine concentrations, from clinical hypoglycaemic events, or from a negative glucose dipstick on urine collected at home. It also warns that a fructosamine concentration inside the non-diabetic reference interval in a cat still receiving insulin may indicate remission, and should prompt a reassessment of the current dosage rather than reassurance.

There is one thing that does not appear to extend a remission once it has happened. A placebo-controlled study of 22 client-owned cats with recent diabetic remissions, randomised to a glucagon-like peptide-1 receptor agonist or to saline once a month for two years, found no difference in remission duration between the treatments. Thirteen of the 22 cats completed the two years without a diabetic relapse, and three left early because their diabetes relapsed. The 2025 guideline's own position on this drug class is that glucagon-like peptide-1 agonists are not routinely recommended, but might be considered in individual cases, especially cats with the potential to go into remission and cats that need to lose weight.

What a blood glucose curve is, and why it is worth more in India

A blood glucose curve is a series of readings taken across a whole dosing interval rather than one reading at one moment, and its job is to show when the insulin starts working, when it peaks, how low it takes the animal and when it fades. That shape, not a single number, is what a dose is adjusted against.

The dog version is a reading about every two hours across a 12-hour period, with feeding timing and portions carefully controlled during it, and the adjustments that follow can be to the dose, to the timing of meals or to the amount fed. Cornell is candid that this many blood tests can be expensive and argues it is worth it to get the dog on the right track.

The cat version starts before the morning injection and then runs every one to four hours through the day. The 2025 consensus guidelines describe the same protocol in more detail: readings before the morning insulin and then every two hours until the evening dose, weekly during the initial phase of therapy, reducing to roughly every three to four weeks once the cat is stable. If no low point is seen, caregivers may be advised to extend the window and run a 14-hour or 16-hour curve instead of the standard 12-hour one.

Cornell adds a frequency floor that owners tend to let slip. Even in a stable cat, blood glucose curves should still be performed every three to four months, because insulin needs change over time.

The single strongest argument for doing it at home is not cost, it is accuracy. Studies in both dogs and cats have shown that at-home monitoring improves glycaemic control in both species and increases the likelihood of obtaining remission in cats. Cornell gives the mechanism: a curve run at home avoids the stress hyperglycaemia and the loss of appetite many cats experience in a clinic, and therefore gives more accurate results. Blood can be collected at home from an ear vein or a paw pad.

One technical detail decides whether your readings mean anything, and it is the one an Indian owner is most likely to get wrong. When advising on home monitoring it is crucial to consider the differences between veterinary-specific and human glucose meters, because human meters typically yield lower readings in cats, owing to species-specific variations in blood composition. Cornell's instruction is that blood should be read on a monitor that has been tested in cats. A human glucometer from an Indian pharmacy will give you a number; whether it is the right number for a cat is a question for your veterinarian, and the safe practice is to establish the offset with the clinic's own analyser before trusting the home meter alone.

A curve is not infallible and the Merck manual says why. Blood glucose curves can detect subclinical hypoglycaemia, but considerable day-to-day variability and the potential for missing night-time lows complicate their interpretation. That is the argument for continuous glucose monitoring, which records interstitial glucose over days and picks up the overnight picture a spot curve misses.

Continuous monitors are real products with Indian prices, which no page for Indian owners states. Cornell names two systems used successfully in veterinary medicine, the MiniMed iPro2 and the Abbott FreeStyle Libre flash system, and the 2025 guidelines describe the Libre being applied continuously to guide dose changes from diagnosis until stabilisation or remission is reached. A FreeStyle Libre sensor is listed by Apollo Pharmacy in India at a maximum retail price of Rs 4,671 and the reader at Rs 5,413.

Where a curve is impossible, fructosamine is the fallback rather than the equal. Cornell says so directly: a fructosamine concentration gives a rough estimate of control over the previous two weeks from a single blood draw, but it is not an ideal way to monitor a diabetic cat, because it measures only the average and not the highs and lows through the day, which are often what actually decides whether treatment is working.

Home glucose monitoring is also how you find out that treatment is working too well. The frequency drops as the animal stabilises, from weekly at the start to roughly monthly once control is steady, and the readings that matter most are the low ones. Cats that remit do so quietly, and the first evidence is usually a run of normal readings on a home curve rather than an announcement in a clinic.

The insulin an Indian owner can actually buy, and what a curve costs here

Nobody has published this, so start with the finding. The veterinary insulin the rest of the world uses is not on MSD Animal Health India's own companion-animal catalogue, which lists eleven products, all of them antiparasitics, vaccines or a skin supplement, with no insulin of any kind. Indian owners are therefore prescribed human insulins, and the Government of India caps what those cost.

Check the absence from the other direction and it holds. Caninsulin is described by its manufacturer as the first veterinary insulin approved for use in both dogs and cats and as trusted by veterinarians in more than 45 countries. The same page lists the territories with their own Caninsulin information sites, and names France, Germany, Italy, Spain, Switzerland, the United Kingdom, Latin America, Brazil, Canada and the United States. India is not among them. This page does not claim the product can never be imported or obtained; it reports that the manufacturer's Indian catalogue does not list it and the manufacturer's country list does not include India, both read on 24 September 2026.

What an Indian owner is actually prescribed is a human insulin, and there is Indian clinical evidence of exactly that. The case report that ranks first on Google India for this query is from the Madras Veterinary College Teaching Hospital in Chennai, where a nine-year-old intact male cat that had dropped from 11 kg to 9 kg in a month, with a random blood glucose of 395 mg/dL, was treated with glargine, a human insulin analogue, alongside a switch from commercial dry food to wet and home-cooked food.

The Government of India ceiling price for every insulin you can buy

Insulin is a scheduled formulation in India, which means the National Pharmaceutical Pricing Authority fixes a ceiling price that nobody may exceed. The figures below are read from the NPPA price list current on 1 April 2026, which carries the gazette notification number and date on every line.

Those ceilings bind, and the retail shelf proves it. Apollo Pharmacy lists Human Mixtard 70/30 40IU Suspension for Injection, a 10 ml vial, at Rs 181, and Lantus 100IU/ml Solution for Injection, a 3 ml cartridge, at Rs 651.50. Divide those out and the Mixtard vial works out at Rs 18.10 per millilitre and the Lantus at Rs 217.17 per millilitre, both a little above the tax-exclusive ceilings of Rs 17.40 and Rs 208.34 and both consistent with those ceilings once goods and services tax is added. Those two divisions are our arithmetic on the listed prices, not figures either source prints.

For completeness on the consumables, Apollo lists a Novofine 31G insulin needle at Rs 15.50 and carries 157 items in its insulins category. Every rupee figure on this page was divided by 84.38 and by 74 before publication, and all of them are rupee-native Indian prices rather than a converted dollar list.

What monitoring costs here, at a government hospital and at home

A single blood glucose at an Indian government veterinary hospital is priced in tens of rupees, not thousands. Madras Veterinary College Teaching Hospital in Chennai prices haematology, biochemistry, urine or culture at Rs 50. Bihar Animal Sciences University at Patna prices Glucose at Rs 80 under its biochemical tests. ICAR-Indian Veterinary Research Institute at Izatnagar prices Glucose at Rs 100 for a pet, Rs 50 for a small animal and Rs 75 for a large animal, with effect from June 2024 and plus tax as applicable. The Centralised Clinical Laboratory at Madras Veterinary College prices serum biochemistry at Rs 150 per parameter for private clinical samples.

Now put a curve against those prices, because that is the calculation no Indian page has done. A 12-hour dog curve at readings every two hours is seven readings. At Rs 50 a test that is about Rs 350 in Chennai, about Rs 560 at Rs 80 in Patna and about Rs 700 at Rs 100 at Izatnagar, before travel, before the consultation and before a day of a frightened animal in a waiting room. Those three multiplications are ours, done on the published unit fees rather than quoted from any rate card Bihar Animal Sciences University, Patna ICAR-Indian Veterinary Research Institute.

The home comparison uses retail prices from the same day. Apollo Pharmacy lists a Dr. Morepen Gluco One BG-03 blood glucose monitoring kit with 25 test strips at a maximum retail price of Rs 758, an Accu-Chek Instant S kit with 10 strips at Rs 820, an Accu-Chek Active kit with 10 strips at Rs 1,124, and a OneTouch Select Plus Simple kit with 10 strips, a lancing device and 25 lancets at Rs 1,075. Strips are the recurring cost: 50 Dr. Morepen BG-03 strips are listed at Rs 795 and 50 Apollo Pharmacy lancets at Rs 140.50.

At Rs 795 for 50 strips, seven strips for one curve work out at about Rs 111, which is our division of the listed pack price rather than a figure Apollo prints. Set that beside Rs 350 to Rs 700 for the same seven readings at a government hospital and the case for learning to do it at home is arithmetic, not preference. It is also the case the evidence makes independently, since at-home monitoring improves glycaemic control in both species and raises the chance of remission in cats.

What India has not published, and how we checked

There is no Indian prevalence study for diabetes in dogs or cats, and we can show the searches. The affiliation instrument, diabetes mellitus in the title or abstract combined with dog, dogs, canine, cats or feline and with India in the author affiliation field, returned exactly 10 records on 24 September 2026. Opening all ten, eight are artefacts: two Zydus Research Centre papers on human type 2 diabetes drugs, a review of experimental animal models, a preclinical diabetic-neuropathy review, a human dental cone-beam study that matched on the canine tooth, a human toxoplasmosis study that listed diabetes among its exclusion criteria, and an adipocyte biochemistry paper.

Two are real. One is a Kerala case series of microfilaruria in three companion animals, in which case 2 is a diabetic dog with an Escherichia coli urinary infection, described as the first documented case of microfilaruria in a dog with concurrent diabetes mellitus; it is a genuine Indian record about a diabetic dog and it is not a diabetes study. The other is the only Indian clinical series of diabetic dogs we could find: 17 diabetic dogs and 10 apparently healthy controls studied jointly by the Indian Veterinary Research Institute regional campus at Bengaluru and the Department of Clinics at Madras Veterinary College, which found systemic hypertension in 10 of the 17 and proteinuria in 3 of the 17.

The title-and-abstract instrument on the same shape returned a Count of 1, and that one record is the Kerala case series, so the affiliation search found the Indian clinical study that the title search missed entirely. A control on the identical shape, parvovirus with India in the affiliation field, returned 84 records and, with India in the title or abstract, 40, so the instrument was working when it returned those small numbers.

That is what a controlled absence looks like. India has case material from two Chennai institutions and no denominator at all, so every prevalence figure on this page is British, Australian or Swedish and is labelled as such. An Indian owner should read those rates as evidence that the disease is uncommon everywhere it has been counted, and not as a measurement of their own city.

Storage is the Indian problem nobody writes about, and it is a household problem rather than a clinical one. Insulin is sensitive and must be stored carefully, neither too cold nor too hot, some formulations need rolling rather than shaking, and none of it should be used past its expiry date. In a humid Mumbai or Kolkata flat through the monsoon, and in a Hyderabad or Pune summer, that means a working refrigerator, the main compartment and never the freezer, and a plan for what happens to the vial during a long power cut. An owner buying a month of insulin at a time should ask the pharmacy how it was stored before it reached the counter, because a vial that has already cooked is a vial that will look like a rising dose requirement rather than like a spoiled drug.

Read the fee evidence on this page for what it is, which is four institutions and not a national picture. The priced tests above come from Madras Veterinary College in Chennai, Tamil Nadu, Bihar Animal Sciences University in Patna, and the ICAR-Indian Veterinary Research Institute at Izatnagar in Uttar Pradesh, with the Indian clinical series drawn from the same Chennai hospital and the institute's regional campus in Bengaluru, Karnataka. Nothing in that record covers Mumbai in Maharashtra, Delhi, Hyderabad, Pune, Ahmedabad or Kolkata, which is where most Indian pet dogs and cats actually live. Private-clinic pricing in those cities is not published anywhere we could reach, so this page does not invent a national range. Ask your own clinic for its glucose fee and its fructosamine fee before the first curve, and ask whether it will teach you to run one at home.

What untreated or poorly controlled diabetes does next

Two complications dominate, and they are species-split. Dogs go blind from cataract and cats develop a hind-limb neuropathy, while both species can tip into diabetic ketoacidosis, which is the one that kills quickly Cornell University College of Veterinary….

A diabetic dog should be treated as a future cataract patient from the day of diagnosis. In a retrospective cohort of 200 diabetic dogs referred to a teaching hospital between 1985 and 1995, half the population had developed cataracts by the 170th day after the diabetes diagnosis, 75 percent by 370 days and 80 percent by 470 days. Of the 200, 23 already had cataracts at diagnosis, and of the remaining 177, 132 developed one. The study's own conclusion is that the majority of diabetic dogs develop cataracts within five to six months of diagnosis.

Cornell adds the part owners assume is negotiable and is not. Even well-managed dogs may eventually develop cataracts, although it takes longer in dogs whose glucose is relatively well controlled. These cataracts mature quickly and may be associated with inflammation, and a veterinary ophthalmologist can assess whether removing the lens would restore vision. Our page on cataract in dogs carries the surgical outcome figures and the Indian prices for that operation.

In cats the nerve damage is the signature complication and it is often reversible. Uncontrolled diabetes can damage the nerves of the hind limbs, producing the plantigrade stance in which the cat walks with its hocks on or near the ground, and Cornell notes this is not painful and will often resolve with treatment.

Diabetic ketoacidosis is the emergency in both species. When cells starved of glucose start breaking down fat for energy, the process creates ketones, which acidify the blood; Cornell calls it a medical emergency requiring hospitalisation. The rarer and more dangerous relative is the hyperglycaemic hyperosmolar syndrome, a state of severe hyperglycaemia above 600 mg/dL with hyperosmolality above 320 mOsm/kg, whose prognosis is worse than that of ketoacidosis.

Ketoacidosis was recorded as the reason for euthanasia in 8 of 233 diabetic UK dogs that were put to sleep, which is 3.4 percent, alongside hyperadrenocorticism in 7 cases and a blood disorder in 5. Its effect on survival differs by species in a way worth publishing: in 114 newly diagnosed diabetic cats, ketoacidosis was not significantly associated with survival time, with a hazard ratio of 1.02 and a 95 percent confidence interval of 0.590 to 1.78, which led the authors to conclude that the complication should not necessarily be regarded as unfavourable.

The kidney is the complication the Indian evidence speaks to. In the Chennai and Bengaluru series of 17 diabetic dogs and 10 healthy controls, renal resistive index and pulsatility index were both raised in the diabetic dogs, and both correlated significantly with fasting blood glucose and with glycated haemoglobin, leading the authors to propose them as early markers of kidney damage. Systemic hypertension was present in 10 of the 17 diabetic dogs.

Infection is the complication that keeps an owner coming back to the clinic without the reason being named. Diabetic animals develop chronic or recurrent cystitis, prostatitis, bronchopneumonia and dermatitis, and, rarely, emphysematous cystitis from glucose-fermenting organisms such as Proteus species, Aerobacter aerogenes and Escherichia coli producing gas in the bladder wall and lumen, which on a radiograph suggests diabetes. Hepatomegaly from fat accumulation in the liver is a common finding on the same work-up.

What actually prevents it, and what does not

There is no screening scheme, no DNA test and no vaccine for diabetes in either species, so prevention is entirely about the modifiable risk factors and about catching the disease early. Three things have measured effects and one of them is free.

Keep a cat lean, because that is the one factor with an effect size attached in both directions. Obese cats are up to four times more likely to develop diabetes than ideal-weight cats, odds rise with every bodyweight category above 4 kg, and, once a cat is diabetic, effective early weight loss is associated with a 15-fold increase in the odds of remission. Weight is the only variable on this page that both prevents the disease and reverses it.

Indoor confinement and inactivity travel with weight and were independently associated with diabetes in the Swedish case-control study of 396 diabetic cats and 1,670 controls. That matters more in India than in Sweden, because Indian city cats are indoors by necessity for months of the year. Our heat safety for cats in India guide covers the confinement side and our cat diet chart India the portion side.

In dogs, question every steroid course that is not clearly necessary. Exposure to glucocorticoids in the six weeks before diagnosis carried an odds ratio of 4.07, with a 95 percent confidence interval of 2.41 to 6.89, against controls. That does not mean refusing a steroid your animal needs; it means asking whether a long or repeated course for chronic skin or ear disease is the only option, and it means telling the clinic about past courses when a diabetes work-up starts.

In an intact bitch, spaying removes an entire route into the disease. Pregnancy and dioestrus predispose a bitch to diabetes because progesterone releases growth hormone from mammary tissue. Forty-six percent of diabetic elkhounds recovered from the disease after ovariohysterectomy, with the chance falling as the wait grew longer, and Cornell's general recommendation is to spay an intact diabetic female to even out insulin requirements. Our guide to dog sterilisation in India covers the operation, the ages and the fees.

• Weigh the animal monthly on a kitchen or bathroom scale and write the number down, because a slow gain is invisible and a slow loss is the first sign of the disease.
• Record water intake in litres in a cool month, so that a summer rise can be judged against a real baseline rather than a memory.
• Ask at every annual visit for a blood glucose and a urine dipstick once a dog or cat passes seven, since feline incidence starts climbing at about 6 years and canine cases cluster around a mean of 8.6 years.
• Tell the clinic about every steroid course the animal has had, given the odds ratio of 4.07 attached to recent glucocorticoid exposure.
• Discuss spaying with your veterinarian for an intact bitch, because the dioestrus-driven form of the disease only exists in entire females.

One thing that does not prevent it is breed choice in the direction most owners assume. The two purebred dogs Indian cities keep in the largest numbers are at the low end of the measured risk, which the breed table below sets out. Choosing a Pug or a German Shepherd over a terrier is not a diabetes strategy, but neither should an owner of either breed be told the disease is likely.

Screening in the human sense does not exist here, and saying so is more useful than implying otherwise. There is no registry, no scheme and no DNA test for canine or feline diabetes, and even in the breed where the genetics have been studied most closely, the Australian Terrier, complex segregation analysis concluded that inheritance is polygenic with no evidence for a large-effect single gene, so there is nothing for a breeder to test. Heritability in that breed was estimated at 0.18 with a 95 percent confidence interval of 0.0 to 0.67, an interval that includes zero.

Living with a diabetic dog or cat, and what the survival figures really say

The survival numbers look frightening until you see what is inside them, and what is inside them is the first fortnight. Median survival for all UK dogs from the date of diagnosis was 15.6 months, with a 95 percent confidence interval of 10.4 to 20.0 months, but for dogs that survived at least seven days past diagnosis it was 20.2 months, with a 95 percent confidence interval of 16.6 to 24.7.

The gap between those two figures is the decision made in the consulting room, not the biology of the disease. The authors say so themselves, that the all-dogs estimate is likely to be negatively skewed by the inclusion of dogs in which management was not realistically attempted, which is why they calculated the second figure at all.

Australian primary-care data quantifies that decision directly, and it is the bluntest number on this page. Among 2,078 dogs diagnosed with diabetes between 2008 and 2017, the cumulative percentage euthanised for diabetes-related reasons was 13 percent at diagnosis, 46 percent within six months and 53 percent within twelve months. Quality of life was the most frequently reported reason. Dogs that were entire, aged ten or over, female, or of a higher-risk breed all had an increased daily hazard of euthanasia in that first year.

Set against that, one treatment variable dwarfs everything else in the survival model. In the UK cohort, dogs that started insulin treatment had a hazard ratio of 0.08, with a 95 percent confidence interval of 0.05 to 0.12 and a P value below 0.001. Neutered dogs sat at 0.58 and Border Collies at 0.39. On the other side, a blood glucose above 40 mmol/L at diagnosis carried a hazard ratio of 2.73 against a reading below 20 mmol/L, previous glucocorticoid treatment 1.86, and being a Cocker Spaniel 2.06 against crossbreeds.

Published median survival times for diabetic dogs disagree with each other and we publish the disagreement rather than averaging it. Swedish insurance data reported a median of 57 days from the first claim across all cases, rising to two years for dogs surviving at least one day; an English primary-care study reported 17.3 months; an Italian referral hospital reported 32 months. Those describe four different populations, and the referral figure describes owners who had already committed to specialist care.

In cats the survival picture is better and it is more stable across studies. Median survival in 114 newly diagnosed diabetic cats was 516 days, with a range of 1 to 3,468 days, and 70 percent, 64 percent and 46 percent were alive beyond three months, six months and twenty-four months respectively. The authors describe the prognosis as fair to good, with a high serum creatinine concentration at diagnosis the one variable significantly associated with a poor outcome, carrying roughly a 5 percent greater hazard of dying for each 10 microgram per decilitre increase.

The routine is the treatment, and it is duller than owners fear. Cornell's summary of best practice is to mimic a healthy animal's glucose rhythm through a steady routine, ideally the same diet at the same times every day, with the day's activity planned and any unusual exertion discussed with the veterinarian in advance. A steady state minimises long-term damage to the heart, liver and kidneys, and once the animal is on a set schedule, costs and complications are minimal.

Keep a notebook. Cornell asks owners of diabetic dogs to chart daily dose, diet and activity, because that record is what alerts you to a developing problem. For cats, the things to record daily are water intake, urine production, appetite, bodyweight, the amount of medication given and, where you are doing it, the glucose readings.

Two Indian practicalities close this out. Needles and syringes need proper disposal, which means a sharps container and knowing how your municipality handles them rather than a kitchen bin. And handling practice pays a dividend years later: a cat taught in kittenhood to accept its paws, ears and scruff being held is a cat from which a blood glucose can be taken at ten, which is the difference between a home curve and a clinic visit. Our guides to adult cat care in India and senior cat care in India carry the routine this sits inside.

A last word on what to expect from your own clinic. The 2018 AAHA guidelines state that an essential aspect of successful management is ensuring the owner is capable of administering insulin, of recognising the clinical signs of inadequately managed diabetes and of monitoring blood glucose at home, which the guidelines describe as ideal but not mandatory. If your veterinarian does not offer that teaching, ask for it, because the evidence says it changes the outcome.