Diabetes in cats

Feline diabetes mellitus is a chronic disease in cats whereby either insufficient insulin response or insulin resistance leads to persistently high blood glucose concentrations. Diabetes affects up to 1 in 230 cats, and may be becoming increasingly common. Diabetes is less common in cats than in dogs. The condition is treatable, and if treated properly the cat can experience a normal life expectancy. In cats with type 2 diabetes, prompt effective treatment may lead to diabetic remission, in which the cat no longer needs injected insulin. Untreated, the condition leads to increasingly weak legs in cats and eventually to malnutrition, ketoacidosis and/or dehydration, and death.

Diabetes in cats can be classified into the following:

  • Type 1 diabetes, in which the immune system attacks the pancreas, is "extremely rare" in cats, unlike in dogs and humans.
  • Type 2 diabetes is responsible for 80–95% of diabetic cases. They are generally severely insulin dependent by the time symptoms are diagnosed. Glipizide for T2DM are not known to be effective in cats, unlike in humans.
  • Gestational diabetes, which occurs in humans and dogs, has never been found in cats.
  • Insulin resistance and diabetes in cats can also have a component of hypersomatotropism (an excess of growth hormone, also leading to acromegaly) and hyperadrenocorticism. In some cats, cancer causes the loss of pancreatic islets.
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