Diabetes in Cats: Managing Blood Sugar and Maintaining Quality of Life

Feline Diabetes: A Manageable Condition

Diabetes mellitus in cats, while a serious diagnosis, is a condition that many cats live with comfortably for years with appropriate management. Unlike dogs, who typically develop Type 1 (insulin-dependent) diabetes almost exclusively, cats most commonly develop Type 2 diabetes — a condition driven by insulin resistance and insufficient insulin production. The distinction matters because Type 2 diabetes in cats can sometimes go into remission with appropriate management, particularly when diagnosed early and treated with low-carbohydrate diet and insulin therapy.

Risk Factors and Recognition

Risk factors for feline diabetes: obesity (the strongest predictor), male sex, middle to older age, physical inactivity, long-term corticosteroid treatment, and certain breeds (Burmese cats have notably elevated risk). Classic signs: polydipsia and polyuria (dramatically increased drinking and urinating), polyphagia (increased appetite) with weight loss, and in more advanced cases, plantigrade stance (walking on the hocks rather than the toes due to diabetic neuropathy). Any cat showing dramatic increases in water intake and urination deserves prompt bloodwork.

Treatment: Diet and Insulin

Diet is the cornerstone of feline diabetes management. Cats are obligate carnivores with a very limited capacity to metabolize dietary carbohydrates; high-carbohydrate diets (dry kibble is typically 30-50% carbohydrate) drive persistent hyperglycemia. Low-carbohydrate wet diets (most wet foods are under 10% carbohydrate on a dry matter basis) significantly improve glucose regulation and are frequently sufficient to achieve remission when combined with insulin therapy in early-stage diabetic cats. Insulin (glargine, or Lantus, is the most commonly used in cats for its 24-hour duration) is typically given twice daily. Home glucose monitoring between veterinary visits is recommended and possible with cat-specific monitors.

Diabetic Remission

Remission — where the cat no longer requires insulin to maintain normal blood glucose — occurs in approximately 20-50% of diabetic cats managed with low-carbohydrate diet and appropriate insulin. Remission is most likely when treatment begins early in the course of disease and when diet is aggressively managed. Monitoring for hypoglycemia (dangerously low blood glucose) is critical during dose adjustments; signs include sudden weakness, trembling, and disorientation.