You can give your dog tuna, but you may choose to stay cautions and stick with other fish that are known to be safer.
Fish is a great source of protein for dogs with finicky digestive systems.
Fish, including tuna, is full of omega 3 fatty acids. They prevent irregular heart rhythms and improve cholesterol levels. These fish oils are incredibly good for the skin, coat, and especially the heart. A dog with a genetic predisposition to heart conditions benefits greatly from healthy doses of omega 3 fatty acids.
The biggest problem with canned tuna is the concern that it’s not so much about the fish but the way it is processed, packaged and preserved.
Canned tuna is safe for dogs if it doesn’t have any additional seasonings, onions and garlic, and it isn’t canned in oil. This oil can cause stomach upset in dogs; onions and garlic are toxic to dogs. Canned tuna has high amounts of sodium; too much salt can cause pancreatitis; salt will also dehydrate your dog.
Canned tuna is okay to feed to your dog on occasion, but because of the high levels of mercury and sodium, it’s best kept as a rare treat.
Tuna steaks are fine, but they should be cooked. Never give your dog fish that still have the bones in it.