Diabetes in Cats: Symptoms, Management & Remission
- Diabetes mellitus happens when your cat cannot make enough insulin or cannot use insulin normally, so blood sugar stays too high.
- The most common early signs are increased thirst, larger urine clumps, weight loss, and a strong or even increased appetite.
- Many cats do best with insulin plus a low-carbohydrate canned diet, and some newly diagnosed cats can go into remission with early treatment.
- FDA-approved oral options such as Bexacat and Senvelgo may help some newly diagnosed cats, but they are not safe for every cat and require careful screening.
- See your vet promptly if you notice drinking and urinating changes, and see your vet immediately for vomiting, weakness, collapse, or not eating because diabetic ketoacidosis can be life-threatening.
What Is Diabetes in Cats?
Diabetes mellitus is a chronic hormone disorder that affects how your cat uses glucose, the body's main fuel source. Normally, the pancreas releases insulin so glucose can move from the bloodstream into cells. In a diabetic cat, insulin is either not produced in adequate amounts or the body does not respond to it well enough, so blood sugar rises.
Most diabetic cats have a form that resembles type 2 diabetes in people, with insulin resistance playing a major role. Obesity, inactivity, age, and some medications can all contribute. Over time, persistently high blood sugar can affect the nerves, urinary tract, liver, and overall energy level.
The encouraging part is that feline diabetes is often manageable. With the right combination of diet, weight control, monitoring, and medication, many cats feel much better within days to weeks. Some newly diagnosed cats, especially those started on treatment early, may even achieve diabetic remission, meaning they maintain normal blood sugar without ongoing insulin for a period of time.
Remission does not mean the disease is cured forever. Cats that go into remission still need follow-up care, weight management, and monitoring for relapse. Your vet can help you choose a plan that fits your cat's medical needs and your household routine.
Symptoms of Diabetes in Cats
- Increased thirst (polydipsia), often noticed as an emptier water bowl or more trips to the fountain
- Increased urination (polyuria), including heavier litter box clumps or accidents outside the box
- Weight loss despite a normal or increased appetite
- Increased appetite early in the disease, though appetite may drop if the cat becomes very sick
- Lethargy, sleeping more, or less interest in play and jumping
- Walking flat-footed on the back legs (plantigrade stance), which can suggest diabetic neuropathy
- Poor hair coat, muscle loss, or a generally unkempt appearance
- Vomiting, dehydration, weakness, or collapse, which can signal diabetic ketoacidosis and need urgent care
The classic pattern is drinking more, urinating more, and losing weight. These changes can develop gradually, so it is easy to miss them at first, especially in multi-cat homes. If your cat seems hungrier than usual but is getting thinner, schedule a visit with your vet soon.
See your vet immediately if your cat is vomiting, not eating, breathing abnormally, seems very weak, or cannot stand well. Those signs can happen with diabetic ketoacidosis (DKA), a medical emergency that needs prompt treatment.
What Causes Diabetes in Cats?
Obesity is the biggest modifiable risk factor for diabetes in cats. Extra body fat makes the body less responsive to insulin, so the pancreas has to work harder. Over time, that strain can contribute to persistent high blood sugar and diabetes.
Other important risk factors include increasing age, male sex, physical inactivity, and treatment with glucocorticoids such as steroids. Chronic pancreatitis and some other illnesses may also damage the pancreas or make blood sugar harder to regulate. In real life, many cats develop diabetes because several of these factors overlap.
Breed risk is less dramatic in cats than in some dogs, but Burmese cats are reported to have increased risk in certain populations. Indoor lifestyle, free-feeding calorie-dense food, and low activity can also push a predisposed cat closer to disease.
This is not a condition caused by one mistake. Many pet parents feel guilty when they hear obesity is involved, but diabetes is usually the result of biology, environment, and time. The helpful next step is focusing on what can be changed now: body weight, diet, monitoring, and a treatment plan you can sustain.
How Is Diabetes Diagnosed?
Your vet usually diagnoses diabetes by combining your cat's history and exam findings with blood work and a urinalysis. The typical pattern is persistently high blood glucose together with glucose in the urine. Because some cats get stress-related blood sugar spikes at the clinic, your vet may need more than one data point before confirming the diagnosis.
A fructosamine test is often helpful because it reflects average blood sugar over the previous couple of weeks. That makes it useful when stress hyperglycemia is muddying the picture. Your vet may also recommend a complete blood count, chemistry panel, urine culture, blood pressure check, or imaging depending on your cat's age and symptoms.
Screening for other problems matters. Diabetic cats may also have urinary tract infections, pancreatitis, kidney disease, hyperthyroidism, or liver changes. These conditions can affect which treatment options are safest and how likely your cat is to stabilize quickly.
If your cat is being considered for an oral SGLT2 medication such as bexagliflozin (Bexacat) or velagliflozin (Senvelgo), the screening step is especially important. These drugs are only appropriate for carefully selected, newly diagnosed cats and are not interchangeable with insulin in every case.
Treatment Options for Diabetes in Cats
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Conservative Care
- Exam, baseline blood work, urinalysis, and fructosamine as needed
- Careful screening to confirm the cat is a candidate for oral therapy
- FDA-approved oral SGLT2 medication such as Bexacat tablets or Senvelgo oral solution for appropriate newly diagnosed cats
- Transition to a high-protein, low-carbohydrate canned diet when appropriate
- Weight-loss plan if overweight
- Early recheck visits with blood and urine monitoring, including ketone monitoring
- Home observation of appetite, water intake, litter box output, and body weight
Standard Care
- Full diagnostic workup and screening for concurrent disease
- Twice-daily insulin therapy, commonly glargine or protamine zinc insulin (PZI/ProZinc), based on your vet's plan
- Low-carbohydrate canned diet and calorie control
- Home glucose or ketone monitoring, or scheduled in-clinic curves
- Recheck exams and fructosamine or glucose-curve adjustments during the first weeks to months
- Education on hypoglycemia signs, feeding schedule, and insulin handling
- Long-term monitoring for remission, relapse, neuropathy, and urinary issues
Advanced Care
- Emergency hospitalization for diabetic ketoacidosis or severe dehydration
- IV fluids, electrolyte correction, and short-acting insulin protocols
- Frequent blood glucose, ketone, and acid-base monitoring
- Treatment for concurrent pancreatitis, infection, hepatic lipidosis, or kidney complications
- Continuous glucose monitoring such as a FreeStyle Libre sensor when appropriate
- Internal medicine consultation for difficult-to-regulate or relapsing cases
- Detailed discharge planning for home insulin, nutrition, and recheck strategy
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Cat Diabetes
Bring these questions to your vet appointment to get the most out of your visit.
- You can ask your vet: Is my cat a good candidate for remission, and what factors make remission more or less likely? This helps you understand the goals of treatment and why early consistency matters.
- You can ask your vet: Is insulin the safer first choice for my cat, or is my cat an appropriate candidate for Bexacat or Senvelgo? Oral medications can be helpful, but they are not safe for every newly diagnosed cat.
- You can ask your vet: Which insulin do you recommend for my cat, and what starting dose and feeding schedule should we use? A clear routine lowers the chance of missed doses and helps with safer dose adjustments.
- You can ask your vet: Can you show me how to give injections, store insulin, and measure doses correctly? Hands-on coaching builds confidence and reduces dosing mistakes.
- You can ask your vet: What signs of low blood sugar, ketones, or diabetic ketoacidosis should send us in right away? Knowing the red flags can help you act quickly in an emergency.
- You can ask your vet: What food should my cat eat, and how should we handle treats, meal timing, and weight loss? Diet and body weight are central parts of diabetes management and remission support.
- You can ask your vet: Do you want home glucose checks, urine ketone checks, a continuous glucose monitor, or mainly in-clinic rechecks? Monitoring plans vary, and understanding yours helps with budgeting and daily planning.
- You can ask your vet: What other conditions should we screen for if my cat is hard to regulate or suddenly worsens? Pancreatitis, urinary infection, kidney disease, and hyperthyroidism can all affect diabetic control.
Can Diabetes in Cats Be Prevented?
You cannot prevent every case of feline diabetes, but maintaining a healthy body weight is the most effective way to lower risk. Portion control, regular weigh-ins, and daily play sessions matter more than many pet parents realize. Even modest weight loss can improve insulin sensitivity in overweight cats.
Food choices also play a role. Many diabetic cats do well on high-protein, low-carbohydrate canned diets, and that same style of feeding may help some at-risk cats avoid excess weight gain. Your vet can help you choose a diet that fits your cat's age, kidney status, and calorie needs.
Routine veterinary care is another prevention tool. Senior cats and cats on long-term steroids should be monitored more closely for changes in thirst, urination, appetite, and weight. Catching diabetes early often means a smoother start to treatment and a better chance of remission.
If your cat has already gone into remission, prevention shifts to relapse prevention. Keep the body weight stable, avoid unnecessary steroid exposure when possible, and stay alert for the same early signs that showed up the first time.