Can Dogs Eat Tuna?

Can Dogs Eat Tuna?

Read time: 3 mins

02 May 2024

Yes, dogs can eat tuna.


However, there are some important considerations that you should be aware of before feeding tuna to your dog. Tuna can have a particularly high mercury content when eaten in large volumes, so it’s really important to keep portion sizes to a minimum. 

Is Tuna Good for Dogs?

Tuna can offer lots of potential benefits for dogs when included as a part of their diet. Some benefits of tuna for dogs include:

Rich in protein

Tuna is a fantastic source of protein, which is essential for muscle growth, repair, and overall development in dogs. The amino acids in tuna contribute to a healthy coat, skin, and strong muscles.

Omega-3 fatty acids

Tuna contains omega-3 fatty acids, particularly EPA and DHA, which support heart health, reduce inflammation, and promote brain function in dogs. These fatty acids also aid in maintaining healthy joints and can be beneficial for dogs with arthritis.

Improved coat health

The omega-3 fatty acids found in tuna contribute to a lustrous, shiny coat and can alleviate skin conditions in dogs, such as dryness, itchiness, and allergies.

Supports cognitive function

The presence of DHA in tuna can enhance cognitive function in dogs, aiding in learning and memory retention, especially in ageing dogs.

Low in saturated fat

Tuna, when served without added oils or excessive seasonings, is low in saturated fat. This makes it a healthier protein option for dogs, supporting weight management and cardiovascular health.

Palatability and variety

Tuna can be a flavorful addition to a dog's diet, offering variety and a change from their regular meals. This can be particularly useful for picky eaters or dogs who require enticing options to stimulate their appetite.


However, it's crucial to note that while tuna provides these benefits, moderation is key. Too much tuna can lead to potential health risks due to its mercury content. Always consult your vet to determine suitable portion sizes and frequency based on your dog's specific needs and health condition.

Can Dogs Eat Canned Tuna?

Yes, dogs can eat canned tuna as long as it is preserved in water only.


However, it's crucial to select the right type and take certain precautions. Tuna packed in water, free from additives like salt or seasonings, is a preferable choice for dogs.

Can Dogs Eat Tuna in Water?

Yes, dogs can eat tuna in water.


Tuna packed in water is a safer option for dogs compared to other varieties. It's essential to ensure there's no added salt or spices, as excessive sodium can lead to health issues in dogs.

Can Dogs Eat Tuna in Brine?

No, dogs should not eat tuna in brine.


The high salt content in brine can lead to sodium poisoning in dogs, causing dehydration, vomiting, diarrhoea, and even more severe health complications.

Can Dogs Eat Tuna in Sunflower Oil?

No, dogs should not eat tuna in sunflower oil.


While sunflower oil itself might not be harmful to dogs in small amounts, tuna preserved in oil could contain excessive added oils and may upset a dog's stomach. Opting for tuna in water is a safer choice.

How Much Tuna Can I Give My Dog?

Moderation is key when it comes to feeding tuna to dogs. As an occasional treat, a small amount of tuna won't typically harm your pet. 


It's important to remember that while tuna can be a tasty addition to your dog's diet, it should not replace their regular balanced meals. A diet consisting solely of tuna can lack essential nutrients and might lead to deficiencies over time. Too much tuna can also lead to mercury poisoning.

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