Common symptoms of canine diabetes are excessive thirst, hunger, excessive urination and weight loss with a normal appetite, states petMD. As the disease progresses, dogs become lethargic and depressed, lose their appetites and often vomit.
Symptoms of canine diabetes seen by veterinarians include enlarged livers, obesity, cataracts and bladder or kidney infections. When a dog is tested for canine diabetes, veterinarians often find an unusually high concentration of blood and urine glucose. Urine tests show high levels of ketone bodies, and imbalances in liver enzymes and electrolytes are common. Diabetes in dogs can usually be managed successfully with the help of a veterinarian, according to petMD.