Dogs can eat tuna in moderation although too much tuna can be bad for your dog.
When feeding your dog tuna you should feed your dog tuna that is packed in fresh water and not the oil kind or salted water.
Also make sure the tuna you feed your dog has no extra salt added.
Tuna is a nutrient-rich fish, full of essential fatty acids and good amounts of protein, however, it can contain more harmful mercury than other fish, particularly when canned.
Too much mercury can cause mercury poisoning in dogs and make them sick or even die as a result.
Only feed your dog tuna in small amounts and not everyday.
Feeding them half a can of tuna a day every other day is okay for a small dog and for a larger dog they can eat a full can of tuna but you should not feed the dog tuna everyday to avoid any mercury poisoning.
You can also mix together some potatoes and carrots and other vegetables to make for a healthy tuna potato and vegetable dog food.
1 Tablespoon extra-virgin olive oil.
1 Idaho potato (Gold or Russet, for example), about 10-11 ounces, washed and finely diced (no need to peel it)
1 carrot, scrubbed and finely diced (no need to peel it)
½ cup water, divided use.½ cup frozen peas, thawed.
2 (4.5 ounce) cans no-salt-added tuna in water.