Can Dogs Eat Tuna?

Verdict: CAUTION — small amounts only, and not regularly.

Tuna is a good source of protein and omega-3s, and a tiny bite now and then won't hurt most dogs. But tuna accumulates mercury, and dogs are smaller than humans — regular or large amounts can cause mercury poisoning.

Why it's risky

Mercury builds up in tuna over time (larger fish like albacore have more). Dogs that eat tuna frequently can develop mercury toxicity, which affects the nervous system. Canned tuna is also often packed in oil or brine, adding fat or salt.

How to serve

• Choose canned tuna packed in water (no salt added), or fresh cooked tuna.
• Rinse canned tuna to reduce salt.
• Serve a small flake — no oil, no seasonings, no onion or garlic.

How much is OK?

A small amount occasionally: a few flakes once a week or less for a medium dog. It should never be a staple. If your dog eats tuna often, switch to safer fish like cooked salmon or sardines (in water).

FAQ

Can dogs eat canned tuna?

Yes, in tiny amounts — choose water-packed, no-salt-added, and rinse it.

Can dogs eat raw tuna (sushi)?

Not recommended — raw fish can carry parasites and bacteria.

What are the signs of mercury poisoning in dogs?

Loss of coordination, tremors, vision problems, behavior changes. Seek vet care immediately if you suspect it.

Is tuna good for dogs?

It's a protein source, but safer fish options exist. Keep it as a rare treat.

Sources

• PetMD: Can Dogs Eat Tuna? (petmd.com)
• AKC: Foods Dogs Can and Cannot Eat (akc.org)