Ask a Vet: Diabetes in Cats
May 5th, 2008 by Dr. Donna SpectorIs your cat gaining weight or eating more than usual? Overweight cats are at high risk for feline diabetes.Obesity, indoor confinement, decreased physical activity and a diet high in carbohydrates are directly associated with diabetes in cats.
Diabetes occurs when the body is unable to regulate blood sugar levels due to a lack of insulin or insulin action. Most cats (and people) suffer from type 2 diabetes, or “insulin resistance.” The body produces insulin, but does not respond to it properly. As a result, the body’s cells shut down, causing other health problems.
Why do cats get diabetes?
Cats are true carnivores. They need meat to survive. There are proteins and fats in meat that cats need and cannot produce on their own. The problem begins when high levels of carbohydrates are introduced into a cat’s diet. For people, carbohydrates are transformed into glucose (sugar) which is the energy source of the body. For cats, glucose comes not from carbohydrates, but from high dietary protein and fat.
Most commercial cat food is moderate to high in carbohydrates. In susceptible cats, long-term feeding of these foods can lead to feline diabetes. Cats should be fed a holistic natural cat food formulated with high-protein foods.
What can we do about feline diabetes?
You can manage your cat’s diabetes with dietary therapy, weight loss and increased exercise—without insulin. Feed your cat high-protein, low-carbohydrate, canned cat food twice a day. Canned cat food contains much lower carbohydrate levels than dry forms of the same food.
If your cat continues to be diabetic, insulin therapy may be the next step. But make a commitment to monitor your cat’s diabetes at home. Your vet can show you how. Most cats with diabetes go into remission with home monitoring.
Dr. Donna Spector , DVM, DACVIM
Dr. Donna Spector is a board-certified veterinary internist who practices in New York City. She has written and lectured extensively on nutrition, diabetes, gastrointestinal disorders and other animal health issues.
Do you need vet advice? Post a comment with your veterinary questions and we will send them to Dr. Donna Spector to be answered in a future column.




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