Diabetes in cats
Diabetes in cats is often linked to obesity. With early treatment and diet, some cats go into remission.
Last updated: October 2026 · 2 sources · see sources
Signs to watch for
- Drinking and peeing more
- Weight loss
- Increased appetite
- Walking flat on the back legs
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
Your vet confirms high blood sugar and sugar in the urine, often with a fructosamine test. [2]
How it's treated
Treatment is insulin injections plus a high-protein, low-carb diet, with regular glucose checks. [2]
Medicines your vet may mention: Insulin glargine (Lantus), ProZinc (PZI insulin). We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $200–$500 | [1] |
| Ongoing treatment, per month | $50–$150 | [1] |
| Ongoing treatment over a year (monthly range × 12) | $600–$1,800 | [1] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Many diabetic cats do well, and some no longer need insulin after a while. [2]
Common questions
What is diabetes in cats?
Diabetes in cats is often linked to obesity. With early treatment and diet, some cats go into remission.
What are the signs of diabetes?
Common signs include: drinking and peeing more, weight loss, increased appetite, walking flat on the back legs.
How do vets diagnose diabetes?
Your vet confirms high blood sugar and sugar in the urine, often with a fructosamine test.
How is diabetes treated?
Treatment is insulin injections plus a high-protein, low-carb diet, with regular glucose checks.
How much does diabetes cost to treat?
Diagnosis (exam and tests): $200–$500; Ongoing treatment, per month: $50–$150; Ongoing treatment over a year (monthly range × 12): $600–$1,800. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.