Is Tuna Sandwich Safe for Dogs? Find Out Now!

As a veterinarian, I am often asked about the safety of human foods for dogs. One common question I get is whether tuna sandwiches are safe for dogs to eat. Tuna is a popular fish among humans, and many pet owners may be tempted to share their sandwich with their furry friend. In this article, I will discuss the safety of tuna for dogs and provide some general guidelines for feeding your dog human foods.

Is Tuna Sandwich Safe for Dogs? Find Out Now!

Can Dogs Eat Tuna?

Yes, dogs can eat tuna, but it should be given in moderation. Tuna is a good source of protein, omega-3 fatty acids, and other essential nutrients that dogs need to stay healthy. However, tuna also contains mercury, which can be harmful to dogs if consumed in large amounts.

How Much Tuna Can Dogs Eat?

The amount of tuna that a dog can safely eat depends on their size and weight. As a general rule, small dogs should not eat more than a few bites of tuna, while larger dogs can eat a small amount of tuna as a treat. A good rule of thumb is to limit tuna intake to no more than 10% of your dog’s daily caloric intake.

Risks of Feeding Tuna to Dogs

As mentioned earlier, tuna contains mercury, which can be toxic in large amounts. Mercury can accumulate in a dog’s body over time, leading to mercury poisoning, which can cause neurological problems, tremors, seizures, and even death. In addition to mercury, tuna also contains high levels of sodium, which can lead to dehydration and other health problems in dogs.

Other Human Foods Dogs Can and Cannot Eat

While it is tempting to share human foods with your furry friend, not all foods are safe for dogs to eat. Here are some human foods that are safe for dogs to eat and some that are not:

Foods Safe for Dogs to Eat

  • Cooked lean meats
  • Fruits (such as apples and bananas)
  • Vegetables (such as carrots and green beans)
  • Plain, cooked rice and pasta
  • Eggs (cooked)
  • Peanut butter (without xylitol)
  • Yogurt (plain, unsweetened)

Foods Dogs Should Not Eat

  • Chocolate
  • Grapes and raisins
  • Onions and garlic
  • Avocado
  • Xylitol (found in sugar-free gum and other products)
  • Alcohol
  • Caffeine


In conclusion, while tuna can be a healthy addition to a dog’s diet, it should be given in moderation. It is important to be aware of the risks associated with feeding your dog tuna and to monitor their intake carefully. If you are unsure about whether a particular food is safe for your dog to eat, consult with your veterinarian before offering it to your furry friend. Remember, the health and safety of your pet should always be your top priority.


Can dogs eat tuna sandwich?
Yes, dogs can eat tuna sandwich but in moderation. Tuna is a good source of protein and omega-3 fatty acids which are beneficial for dogs. However, tuna sandwiches often contain other ingredients like mayonnaise, onions, and spices that can be harmful to dogs. It’s important to avoid giving tuna sandwiches with these ingredients to dogs.

What are the risks of feeding tuna sandwich to dogs?
Feeding tuna sandwiches with ingredients like mayonnaise, onions, and spices can cause digestive upset, vomiting, and diarrhea in dogs. In addition, tuna contains high levels of mercury which can lead to mercury toxicity if fed in excess. It’s important to feed tuna in moderation and avoid giving it too frequently to prevent health issues.

How can I safely feed tuna to my dog?
If you want to feed tuna to your dog, it’s best to serve it plain or with a few simple ingredients. Cooked plain tuna or canned tuna in water (not oil) is a good option. You can also try mixing a small amount of tuna with your dog’s regular food or using it as a training treat. Just be sure to avoid tuna sandwiches with added ingredients that can be harmful to dogs.

Scroll to Top