Obesity in cats
Obesity is common in indoor cats and raises the risk of diabetes, arthritis and liver problems.
Last updated: October 2026 · 2 sources · see sources
Signs to watch for
- Can't feel the ribs
- Belly sagging
- Trouble grooming
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
Body condition scoring and weight trends. [2]
How it's treated
A slow, measured weight-loss plan with your vet. Cats should never lose weight too fast because of liver risk. [2]
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $50–$100 | [1] |
| Ongoing treatment, per month | $30–$80 | [1] |
| Ongoing treatment over a year (monthly range × 12) | $360–$960 | [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
Even modest weight loss improves comfort and health. [2]
Common questions
What is obesity in cats?
Obesity is common in indoor cats and raises the risk of diabetes, arthritis and liver problems.
What are the signs of obesity?
Common signs include: can't feel the ribs, belly sagging, trouble grooming.
How do vets diagnose obesity?
Body condition scoring and weight trends.
How is obesity treated?
A slow, measured weight-loss plan with your vet. Cats should never lose weight too fast because of liver risk.
How much does obesity cost to treat?
Diagnosis (exam and tests): $50–$100; Ongoing treatment, per month: $30–$80; Ongoing treatment over a year (monthly range × 12): $360–$960. 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.