Updated at: 24-12-2021 - By: petexpert

Fresh tuna contains much higher concentrations of mercury than the other varieties of fish like salmon and the tilapia. Ingestion of too much mercury could cause mercury poisoning that can lead to severe or even fatal health issues. Mercury is introduced into our rivers, lakes and oceans via industrial processes including coal-fired power generation.

The mercury builds up in fish. The larger the fish , and the longer it stays alive the greater the amount of mercury in the tissues. Since tunas are huge and long-lived fish their mercury levels are very high. Non-profit organization Consumer Reports recommended that people reduce their tuna consumption in accordance with their weight. Because dogs are less hefty than humans, and also because there are no guidelines for how much tuna a dog is able to eat safely so it is best not to give it to your pet at all.

If you’d like to treat your dog to a fish meal then you must pick a variety that has lower levels of mercury. The most safe types of fish that are fresh are the ones that are most frequently used for commercial pet food. This includes whitefish, salmon flounder, herring and Arctic Char. Don’t be worried should your dog manage to grab some tuna off your plate while you’re not watching.

Tuna isn’t toxic for dogs, and even a small amount won’t result in mercury poisoning. If you have cats and dogs ensure that your pet isn’t eating feline food, as cat food is often made up of tuna. Cats are also at risk of mercury poisoning. So, think about making a cat’s food by other fish species.


Why Is Tuna Bad For Dogs?

Tuna isn’t a necessarily toxic dog food. Fish generally contains low levels of fat, and is high in protein and omega-3 fatty acids. So it seems, on the surface as a good food for dogs. However, there’s the issue of the levels of mercury in tuna that you need to take into consideration.

Tuna has among the highest levels of mercury of all fish. And it’s the same for canned tuna as well as fresh tuna. If your dog is fed too much of a diet that is contaminated with mercury, they could be at possibility of developing a case of mercury poisoning. This may be fatal in certain instances.

What Should I Do If My Dog Eats a Tuna?

If you find that your dog managed to devour a tiny chunk of tuna meat, it’s a good possibility that they’ll be okay. However, if you discover that they’ve eaten a more substantial amount of tuna, or are eating the fish on a regular basis There’s a possibility that mercury poisoning could develop. The most frequent indicators of mercury poisoning among dogs are:

  • Very anxious and losing coordination
  • Bloody vomit
  • Diarrhea
  • Losing their hair
  • Tremors
  • The kidneys are damaged
  • Blindness

If you see any of these signs appearing after eating tuna, consult an emergency veterinarian and follow their instructions. If your dog seems to be constantly craving tuna, you should look at other fish alternatives that are safer such as salmon, arctic char and flounder.

Serving Ideas

Raw tuna is better in dogs as opposed to raw salmon which is quite risky. It’s better to only serve cooked tuna to your dog , or else you run the risk of being exposed to parasites. Don’t share tuna that’s cooked in oil or butter, or is spiced with powerful spices, onions, or garlic.

When serving tuna that’s canned choose tuna that’s been stored in water and not oil, to reduce excessive fats. Take tuna in small portions, only one or two bites, not more than twice a week. The dog’s digestive system isn’t designed to deal with fish daily. At the very least, not without gradually getting used to.


Tuna Recipes for Dogs

Chef of Rover Kiki Kane has created a number of delicious recipes for dogs like the Chicken Pot Pie treats. Here, I used chicken for tuna to make a protein-rich, crunchy food that canine lovers who love tuna will want.

Gâteries pour chiens au pâté au thon

Author: Kiki Kane Prep Time: 20 minutes Cook Time: 20 minutes Total Time: 40 minutes Yield: variable


  • 2 cans tuna stuffed with water (no-sodium is ideal)
  • 2 1/2 cups of flour (AP flour wheat, oats, or AP flours will work)
  • Half low or no-sodium poultry broth
  • 2 eggs
  • Alternately options: turmeric, sage and parsley, to taste
  • Half cup of frozen mix peas, carrots, or any leftover plain veggies chopped
  • You’ll need a cookie cutter (or glass is sufficient in an emergency!) We used a tiny biscuit cutter since the fluted edges are reminiscent of pie crust.


The oven should be heated to 350oF (175 degrees Celsius). Put the flour along with the meat, spices, and meat (if they are used) in an unmixed bowl. Mix to mix. Add the broth the mix, thoroughly mixing in eggs and mix until the dough is able to hold together easily.

Fold in the vegetables, being cautious not to smash the vegetables too much. Divide the dough in half , form into approximately 1/4 inch thickness. Cut out the dough the cookies, then place them on a lined cookie sheet with parchment. Baking the cookies till they are slightly golden on the edges, approximately 20 minutes.


Canned Tuna (or Dog Food) Treats for Dogs with Special Diets

If your dog is suffering from food sensitivities and can consume eggs and fish or loves tuna, you can try these crunch eggs and tuna treats. Simply smash the tuna in a can and mix in eggs and bake them at a low temperature.

  • Author: Kiki Kane
  • 5. mins
  • Cook Time 25 minutes
  • All Time Time: 30 mins
  • Yield 1 tray


  • 2 cans of tuna or 1 can of dog food of your preference
  • 2 eggs

If your dog doesn’t like eggs. Here’s how you can make a flax substitute

  • For replacing one egg, mix one tablespoon of ground flaxseed and 2 tablespoons of warm water . allow it to set for in a couple of minutes until it becomes thicker.

Do you need to alter the consistency? Add a bit of Oat flour to make it thicker or water to thin the mix. Bake for about 25 minutes or until the edges are just browned on the edges. Once the cookies are firm to make a soft snack Bake a bit longer until they are completely crisp. This will result in a crisp cookie that does not require refrigeration.

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