Not veterinary advice. This page is general information from published sources, not a diagnosis. If your dog ate something toxic, call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 right now (a fee may apply).

🐟 Seafood

Can dogs eat tuna?

In moderation
Only a tiny amount occasionally, because tuna is high in mercury.

Why

Tuna is not inherently toxic, but it contains high levels of mercury, and dogs are more sensitive to mercury than humans, so regular consumption can be risky. Fresh tuna carries more mercury than fish like salmon, and canned tuna often adds salt or preservatives. A small, one-off bite is unlikely to cause harm.

How much is safe

If offered at all, give only a very small amount infrequently; lower-mercury fish such as salmon are better choices.

Warning signs to watch for

Repeated exposure can lead to mercury accumulation; watch for signs of poisoning and consult a vet with any concerns.

Helpful for treat time

Dog fish-oil supplement ↗KONG stuffable treat toy ↗

Affiliate links — we may earn a commission at no extra cost to you.

More foods in this group

🐟 Salmon (cooked)🐠 Sardines🍤 Shrimp🌰 Almonds🍞 Bread (plain)🥦 Broccoli

Frequently asked questions

Can dogs eat tuna?
Only a tiny amount occasionally, because tuna is high in mercury. Tuna is not inherently toxic, but it contains high levels of mercury, and dogs are more sensitive to mercury than humans, so regular consumption can be risky. Fresh tuna carries more mercury than fish like salmon, and canned tuna often adds salt or preservatives. A small, one-off bite is unlikely to cause harm.
How much tuna can a dog have?
If offered at all, give only a very small amount infrequently; lower-mercury fish such as salmon are better choices.
What are the symptoms if a dog eats too much tuna?
Repeated exposure can lead to mercury accumulation; watch for signs of poisoning and consult a vet with any concerns.
What should I do if my dog ate something toxic?
Call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 right away (a consultation fee may apply). Have the food, the amount, and your dog's weight ready. Do not induce vomiting without professional guidance.

Source & last checked

  • Safety rating from AKC ↗
  • Last checked: 2026-07-20
  • Every dog is different — size, age, allergies, and health conditions matter. When in doubt, ask your veterinarian before introducing a new food.
← All foodsQuick food checker tool →