Feline diabetes is remarkably similar to diabetes in people: it comes in two types, it can be recognized by a characteristic set of signs and it often requires careful management. While some cases of diabetes are hard to prevent, you can lower your cat's risk and keep her healthy through exercise and good nutrition.
What Causes Diabetes in Cats?
Feline diabetes occurs when a cat develops high blood sugar due to a deficiency in insulin, a hormone secreted by the pancreas (an organ located in the middle of your cat's abdomen below her stomach). Insulin lowers blood sugar levels by moving sugar from the bloodstream into cells where it is needed. Proper blood sugar levels are important because it determines the amount of glucose (a major source of energy for the body) your cat's cells receive.
Conditions, such as pancreatitis or genetic factors can negatively impact the pancreas and lead to low insulin levels, causing Type 1 diabetes. Type 2 feline diabetes is more common. In those cases, even though a cat is making enough insulin, her body does not respond to the hormone. As a result, she develops high blood sugar.

Just like in humans, obese cats are at increased risk for insulin resistance and diabetes. Cats who are on long-term steroids, either via injection or orally, are also at an increased risk for developing Type 2 diabetes because steroids interfere with insulin's function.
Type 1 diabetes is classified as a chronic disease without a cure, meaning that the cat will require treatment for life. Type 2 diabetes, on the other hand, is known to be reversible in many cases by losing weight. When the unhealthy weight is lost, many cats go into remission, which means they start responding to insulin again and can stop receiving treatment.
Symptoms of Feline Diabetes
The classic signs associated with feline diabetes include:
- Excessive thirst and drinking more
- Urinating a lot
- Eating more than usual
- Weight loss
- Obesity
Unlike dogs, cats do not tend to get diabetic cataracts or eye problems. Pet parents may not notice weight loss if their cat is overweight or obese, but they will notice the excessive drinking and urinating. Diabetes can also make a cat feel nauseous or lethargic, and some pet parents notice that their cat is lying around a lot and not eating.
Another sign you may notice is that your cat is walking oddly or holding her back legs in a strange position. High blood sugar's effect on the nerves of her back legs can sometimes weaken her hind legs. If you see any of these signs or behaviors, take your cat to the veterinarian to get tested.