Food safety

Is tuna safe for cats?

Updated 2026-07-16 · Not a substitute for professional veterinary care

Occasional treat only

Short answer

In small amounts, occasionally, yes. But tuna is not a complete food for cats. Fed often it can crowd out balanced nutrition, add too much mercury and salt, and some cats become fussy and refuse their proper food. Keep it to a rare treat.

Why cats find tuna irresistible but it is not a meal

Tuna is strong-smelling and rich, so cats love it, but canned tuna made for people is missing nutrients a cat needs, such as the right balance of taurine, vitamin E, and calcium. A diet heavy in tuna can lead to deficiencies over time. It is a flavour, not a food.

The real risks of too much tuna

Nutritional imbalance if it replaces complete cat food
Mercury builds up with frequent feeding
Excess salt and oil in tuna packed for humans
Fussiness, where a cat holds out for tuna and refuses balanced meals

How to give tuna safely

Offer a small flake occasionally, not as a regular meal.
Choose tuna in spring water, not brine or oil, and never seasoned.
Keep it under about a tenth of the day's food, the same rule as any treat.

When in doubt, call a vet. This guide is general information for cat owners. It is not veterinary advice, and it is not a substitute for professional veterinary care, diagnosis, or treatment. If your cat is in distress, contact a veterinarian or your nearest emergency clinic straight away.

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Common questions

Can cats eat tuna every day?

No. Daily tuna risks nutritional deficiencies and mercury build-up, and encourages fussiness. Keep it occasional.

Is raw tuna safe for cats?

Raw fish carries a risk of bacteria and parasites and contains an enzyme that destroys a B vitamin cats need. Cooked, plain, and occasional is safer.