Can Cats Eat Tuna? Sometimes — Here's the Catch

Short answer: yes, as an occasional treat — but tuna should never become your cat's diet, no matter how convincing the campaign for it gets.

Why Tuna-as-Diet Fails

Plain tuna is nutritionally incomplete for cats: too little vitamin E, calcium, and other essentials, and an unbalanced mineral profile. Cats fed heavy tuna diets can develop deficiencies — and there's the mercury issue: tuna is a large predatory fish, and regular consumption accumulates mercury in a small body fast. A cat is not a small human; a weekly tuna habit for you scales to a much bigger dose for a 10-pound animal.

The Safe Way to Share

• Amount: a teaspoon to a tablespoon of flaked tuna, no more than once or twice a week.
• Type: chunk light in water (lower mercury than white/albacore), no added salt, drained.
• Never: tuna in oil, flavored tuna, or raw tuna sushi scraps (thiaminase in raw fish destroys vitamin B1).

The Picky-Eater Trap

Tuna is so intensely flavorful that some cats begin refusing their regular food and holding out for it — a standoff cats usually win. Keep tuna rare and unpredictable, never a response to food refusal. (More on balanced feeding in the nutrition guide.)

Good Uses for the Tuna Card

Hiding a pill, encouraging appetite after illness (vet-approved), topping food during a diet transition, or high-value rewards for carrier training. Save the big guns for the big moments.

Better Everyday Fish Fix

Cat foods formulated with fish deliver the flavor with complete, balanced nutrition — the sensible answer for genuine fish enthusiasts.