Diabetes in cats works differently than in dogs. Most diabetic cats have Type 2-like diabetes, related to insulin resistance and obesity. Critically, many can achieve diabetic remission (effectively going off insulin) with the right diet combined with insulin therapy. The dietary choice matters enormously.

How Cat Diabetes Differs from Dog Diabetes

  • Most diabetic cats are Type 2-like (insulin resistant)
  • Many achieve remission with proper treatment (rare in dogs)
  • Diet plays a more transformative role
  • Low-carb diets are dramatically more effective than for dogs

Why Low-Carb Works

Cats are obligate carnivores designed for high-protein, low-carb diets. When given lots of carbs (typical of most dry foods), they develop insulin resistance, experience blood sugar spikes, gain weight, and predispose to diabetes.

Reversing this with very low-carb (under 10% DM) high-protein diet often results in better blood sugar control, reduced insulin requirements, and in many cats, full remission.

What to Look For

Very low carbohydrate:

  • Under 10% carbs DM ideally
  • Under 5% even better
  • Calculate: 100% - protein% - fat% - moisture% - ash% (estimate ash at 8%)

Very high protein: 40-55% DM from named animal sources

Wet food strongly preferred: Naturally lower carb than dry, higher moisture

Prescription Options

  • Purina Pro Plan Veterinary DM: Specifically for feline diabetes. Very low carb. Well-evidenced.
  • Royal Canin Diabetic
  • Hill's Prescription Diet m/d

OTC Alternatives

Many high-quality canned cat foods naturally meet the low-carb profile. Fancy Feast Classic Pâté (surprisingly low-carb), Wellness Core, Tiki Cat. Check current macros — recipes change.

Working with Your Vet

  • Insulin doses may need adjustment as diet changes
  • Glucose monitoring critical during transition
  • Some cats achieve remission within weeks; others take months
  • Even cats in remission need monitoring

What to Avoid

  • High-carb dry foods (many regular dry foods have 30-40% carbs)
  • Free-feeding
  • Sugary treats
  • Stopping insulin based on diet alone — coordinate with vet

FAQ

Will diet alone cure my diabetic cat?

Diet alone isn't typically enough. Combined with insulin therapy, the right diet creates conditions for remission.

Can I use OTC food instead of prescription?

Quality low-carb canned cat foods can work. Verify macros with your vet.

The Bottom Line

Feline diabetes responds dramatically to low-carb, high-protein wet food combined with insulin. Many cats achieve remission. This is one of the most impactful dietary interventions in veterinary medicine.