Bad Breath

• The breath of a cat with ketoacidosis may smell like nail polish remover or fruit.
  
  

Ketones in the Urine

• Make testing for ketones part of your diabetic cat's routine home care. Ketone test strips are available at drugstores. Hold a strip under a stream of urine to do a test. Some glucometers can test for both blood glucose levels and ketones. Ask your veterinarian about Glucotest paper squares to put in your cat's litter box.
  
  

Increased Drinking and Urination

• The kidneys try to get rid of ketones by excreting them into the urine. This causes increased urination and thirst.
  
  

Dehydration

• To tell if your cat is dehydrated, lift up a patch of skin. It should snap back into place immediately. Another way to tell is to feel the cat's gums; if they're tacky or dry, the cat's dehydrated.
  
  

Lack of Appetite

• Loss of appetite is always cause for concern in cats. If your diabetic cat refuses to eat for 12 hours or more, suspect ketoacidosis.
  
  

Vomiting and Lethargy

• If your diabetic cat vomits, is lethargic or just doesn't seem right, test for ketones. Also learn how to test your cat's blood glucose levels at home. High blood glucose levels indicate that your cat is not getting enough insulin, which can cause ketoacidosis. Other causes of ketoacidosis are infection and not getting enough food.