Causes
A lack of insulin or resistance to it. Contributing factors: obesity (especially in cats), genetics, pancreatitis, age, certain medications, and other hormonal diseases.
Diagnosis
Blood and urine tests (persistently elevated blood glucose, glucose in the urine). The vet confirms the diagnosis and rules out complications.
Treatment
Lifelong treatment: injectable insulin (almost always), a specific diet, weight control, and stable routines. With good management, quality of life is good. Some cats even go into remission if the condition is controlled early.
Prevention
Weight control (obesity is a major risk factor, especially in cats), a good-quality diet, and exercise.

