Human tuna lacks the balance of nutrients cats need, including enough vitamin E. Diets heavy in fish were historically linked to steatitis ('yellow fat disease'), a painful inflammation of body fat. Raw fish also contains an enzyme that destroys thiamine (vitamin B1). Tuna made for cats is formulated to avoid these problems.
Yes, in moderation
A little, occasionally. Plain tuna in water is a safe treat for cats, but it isn't a complete food and contains mercury. Cats fed lots of tuna can become fussy eaters and miss out on nutrients. Avoid tuna in oil or brine.
This guide is general information, not a diagnosis. If your pet seems unwell, or you're worried, call your vet.
What you need to know
How to offer it safely
- Offer a teaspoon of tuna in water as an occasional treat.
- Choose tuna in spring water with no added salt.
- Never make human tuna the main diet.
Treats, including human food, should make up no more than about 10% of your cat's daily calories. Our calorie calculator shows your cat's daily needs. Introduce any new food slowly and stop if it causes vomiting or loose stools.
Other foods for cats
See all 15 foods: what cats can and can't eatFree tools for this
Sources
- Cornell Feline Health Center: Experts address feline nutrition
- ASPCA: People foods to avoid feeding your pets
We check guides against veterinary sources and update them when guidance changes. How we write and review.
Questions.
Can cats eat tuna every day?
No. Use it as an occasional treat; a complete cat food should make up the diet.
