Meats & proteins
Can cats eat sardines?
Sardines in water with no salt added are a nutritious occasional treat. Oil and sauces are not.
Portion: About half a sardine, once a week or so.
The short answer
Yes, in moderation. Sardines are small, low in mercury and rich in omega-3s, which makes them one of the better fish treats. Buy them canned in spring water with no added salt, drain them, and offer a small piece. Their soft canned bones are edible. Avoid sardines in oil, brine, tomato sauce or mustard.
Why the verdict
Sardines are low on the food chain, so they carry much less mercury than tuna. Their fat is rich in polyunsaturated omega-3s, so large, frequent servings add a lot of calories and could strain vitamin E status over time. Sodium from brine is the main hazard in many canned products.
How to prepare it
- Canned in water, no salt added.
- Drain completely.
- No oil, brine, tomato sauce, chilli or mustard.
- Break into small pieces.
Signs of trouble
- Vomiting or diarrhoea
- Excessive thirst (salty varieties)
Sardines & cats: FAQ
Can cats eat sardines in olive oil?
Not recommended. The oil adds a lot of fat and can cause diarrhoea. Pick sardines in spring water.
Can cats eat sardine bones?
The softened bones in canned sardines are generally safe. Raw or cooked fresh fish bones are not.
Are sardines better than tuna for cats?
As an occasional treat, yes. Sardines carry less mercury.
Related foods
See every food that’s toxic to cats →
Sources
- Cornell Feline Health Center — Feeding Your Cat (accessed 2026-09-29)
- Merck Veterinary Manual — Nutritional Requirements and Related Diseases of Small Animals (accessed 2026-09-29)
Last updated 2026-09-29. We are not veterinarians: this guide summarises published veterinary references and is not a substitute for advice from your vet. See our methodology and disclaimer.