Can dogs eat
Tuna?
With caution
Only rarely, if at all. Tuna is not toxic like onions or chocolate, but its mercury content means it should be an occasional treat at most, and albacore is best avoided.
What to watch out for
Tuna is not poisonous in the way onions or chocolate are, but the AKC points out that it can still pose risks because of its high mercury levels. Many tuna species are large, long-living fish, and dogs can be affected by even small amounts if tuna is eaten regularly. PetMD cites the FDA in noting that tuna is higher in mercury than nearly all other commercial seafood.
The AKC says albacore accumulates high levels of mercury and should be avoided, whether canned or fresh. If you occasionally share canned tuna, it recommends 'light' or skipjack tuna packed only in water, with no added salt or seasonings. PetMD adds that tuna should not be fed to puppies, or to dogs that are small, young or have health problems.
Packaging matters too. Canned tuna often contains added salt or is packed in oil, and PetMD links oil-packed tuna to pancreatitis. Raw tuna can carry parasites or bacteria, and PetMD advises cooking all seafood before it goes in your dog's bowl.
Benefits
- Protein-rich
- Very appealing flavor, useful for picky eaters
Risks
- Mercury can build up if tuna is fed regularly; albacore is the one to avoid
- Added salt in brine-packed tuna
- Oil-packed tuna adds fat and is linked to pancreatitis
- Raw fish may carry parasites or bacteria
- Too much can unbalance a complete diet
What to give instead
If you choose to share tuna at all, pick light or skipjack tuna packed only in water with no added salt or seasonings, drain it, and offer a small amount as an occasional topper. Skip brine, oil, spices and sauces.
Treats and extras should stay under 10% of daily calories. PetMD advises against tuna for puppies and for dogs that are small, young or have health problems, so check with your vet first if that describes your dog.
Related forms
| Food | Verdict | Why |
|---|---|---|
| Light or skipjack tuna in water | With caution | The AKC's pick if you share any tuna; plain, with no added salt, and only occasionally. |
| Albacore tuna | No | The AKC says albacore accumulates high levels of mercury and should be avoided. |
| Canned tuna in oil or brine | No | Added fat or salt; oil-packed tuna is linked to pancreatitis. |
| Raw tuna and sushi | No | Raw fish can carry parasites or bacteria; cook all seafood. |
| Seasoned or marinated tuna | No | May contain onion, garlic or heavy salt. |
If your dog already ate it
A little tuna is usually harmless. The concern with regular feeding is mercury, whose signs can include tremors, loss of coordination, vision loss and kidney problems, so see a vet if those appear.
If your dog ate a large amount, or tuna flavored with onion, garlic or other seasoning, call your vet or ASPCA Animal Poison Control (888) 426-4435 / Pet Poison Helpline (855) 764-7661 (US; fees may apply). Outside the US, call your local emergency vet. Do not try to make your dog vomit at home.
Watch for vomiting, diarrhea or lethargy.
Frequently asked questions
Can dogs eat canned tuna?
Neither canned nor raw tuna is considered completely safe, according to the AKC. If you share any, choose light or skipjack tuna in water with no added salt, drain it and keep it occasional.
Is tuna bad for dogs because of mercury?
Mercury is the main reason to limit it. The AKC says even small amounts can be a problem if eaten regularly, and recommends avoiding albacore.
Can dogs eat tuna with mayo?
It is better not to. Mayonnaise adds fat, and tuna salad often contains onion, which is harmful to dogs.
Is salmon a better choice than tuna?
Both the AKC and PetMD describe salmon as lower in mercury than tuna, and PetMD calls it a safer option. Seafood should always be fully cooked, and your vet can advise on the best choice for your dog.
Written from veterinary sources by the Pawsplained editorial team. Not yet reviewed by a veterinarian; this is general information, not a diagnosis or treatment plan. Updated Oct 25, 2026. Editorial policy