Increased thirst
Increased urination
Increased appetite
Weight loss despite eating normally or more than usual
Lethargy or low energy
Poor coat condition
Weakness in the hind legs
Urinating outside the litter box
Sweet or unusual odor on the breath
Vomiting
Dehydration
Recurrent infections
Sudden changes in behavior or activity
Elevated blood glucose on veterinary testing
Glucose or ketones in the urine on veterinary testing