Can I Feed My Cat Canned Tuna?

You’ve been feeding your cat canned tuna for years, but you are not sure if it is safe anymore. What would happen if your cat ate a can of tuna? You want to make the right decision about what to feed your pet. 

The FDA has not issued any directives on whether or not it is safe to feed your cat canned tuna, but the advisory encourages owners to stop giving their cats canned tuna and other types of fish in cans because there’s a high risk of health problems associated with them. This article will give you answers to any question that you may have about canned fish in general or specifically concerning canned tuna for cats.

Can I Feed My Cat Canned Tuna? 

It is not good to feed your cat canned Tuna, especially on a regular basis. However, it is acceptable if you only feed your cat canned tuna once in a while as a special treat or if you suddenly run out of cat food till the next day. For me, I would rather not feed my cat canned tuna at all because it does more harm than good to your cat’s health. In fact, tuna can kill your cat!

Tuna contains a lot of mercury, which can cause mercury poisoning in cats. Mercury damages the brain, nervous system, gastrointestinal, respiratory, and reproductive systems. Sodium, magnesium, and phosphorus can contribute to the formation of kidney stones and adversely impact an animal that is already prone to renal failure. Other heavy metals and compounds are also present in tuna. Canned tuna lacks the minerals, vitamins, and other nutrients that cats require to maintain their health. Even humans are only allowed to consume it once a week at the most.

Normally, Cat foods are carefully prepared to include all of the vitamins and minerals that cats require in adequate amounts. Tuna in a can is not cat food, as it lacks certain vitamins and minerals, especially Taurine (an essential amino acid in cats). Cats cannot survive without taurine! It is critical for normal vision, digestion, heart muscle function, to maintain normal pregnancy and fetal development, and to maintain a healthy immune system. Your cat could die of heart failure if you don’t give him foods containing taurine. Purchase some cat foods (especially wet cat foods) instead of giving your cat canned tuna!

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Tuna also contains an enzyme called thiaminase that degrades vitamin B1 (thiamine) and too much unsaturated fatty acids which depletes vitamin E. Cat’s need high loads of vitamin B in their diet, so feeding a cat too much raw fish tuna) would give them a thiamine deficiency. The side-effects of which include seizures and a loss of control over body movements.

Canned tuna can also cause steatitis in cats. Steatitis is a painful condition that arises when there is inflammation of fat, commonly yellow fat, causing saponification and fat necrosis. It is caused by vitamin E deficiency.

Many species of fish, other than tuna, also contain thiaminase, and feeding these species of fish to any cat is dangerous.

How Canned Tuna Can Affect Your Cat Nutrition 

Canned tuna is not a nutritionally balanced food for cats and can actually be harmful to their health. Cats that are fed tuna regularly may become picky eaters and refuse to eat other types of food. 

While tuna is a nutritious food for cats, it’s important not to feed them too much. Too much tuna can lead to mercury poisoning, which can be fatal. So, it’s best to stick to the recommended serving size and only give your cat canned tuna occasionally. 

Why Cats Eating Canned Tuna May Gain Weight

Cats who eat canned tuna may gain weight because of the high levels of mercury in the fish. The mercury can accumulate in the cat’s body and cause health problems.  Cats who eat canned tuna should only do so occasionally and in moderation.

The medical information provided in this article is provided as an information resource only. This information does not create any patient-physician relationship and should not be used as a substitute for professional diagnosis and treatment.
Why Cats Eating Canned Tuna May Gain Weight
Mercury in Canned Tuna Can make Your Cat Gain Weight

Nowadays, pet food companies are including calorie content information on their labels. This makes it easier for guardians to determine how many calories their cats are eating per day. By monitoring the food intake of their cats, guardians can help ensure that their cats maintain a healthy weight and live long happy lives.

What Are The Safest Ways To Feed Canned Tuna To Your Cat? 

Canned tuna is a popular food choice for cats, but it’s important to be aware of the risks associated with feeding it to them too often. It is better you feed your cat canned tuna as a special treat once in a while. It’s also important to keep portion sizes small, as large amounts of tuna can lead to weight gain.

Cats that eat canned tuna more than once a week can develop health problems, such as vitamin E deficiency and thiamine  (vitamin B1) deficiency. Finally, canned tuna should not be given to cats with chronic health conditions, such as kidney disease or heart disease.

How Much Tuna Can I Feed My Cat? 

Tuna can be fed as a single meal or divided into multiple small meals throughout a month period. It is important not to overfeed cats, as this can lead to obesity and health problems in the long run. 

Cats love tuna as a treat and it is a good source of protein for them. However, cats should not be fed too much tuna as it can lead to health problems. Cats can be fed tuna-flavored cat foods and cooked fish, but it is important to monitor their intake to make sure they are getting the right nutrients.

In addition, it is safe to feed a cat refrigerated canned cat food leftovers as long as they are not the only type of food they are given. This will give them some variety in their diet and make them more likely to eat the cooked fish. If you are going to do this, however, make sure that the leftovers are cold or room temperature before serving. 

What If My Cat Is Addicted to Tuna? 

If your cat is addicted to tuna, you will need to gradually wean them off of fish and onto other protein sources. This can be done by mixing increasing amounts of tuna with decreasing amounts of other protein sources until they are completely switched over. You can also try a different type of seafood or meat for your cat’s diet. 

It’s important to feed them a balanced diet so they don’t develop aversions to certain textures or proteins. If there’s no chance of changing their taste, you can entice them to eat nutritionally balanced commercial cat food by mixing it with water and adding a  small amount of tuna. 

Cats that are addicted to tuna may start to show signs of withdrawal when you stop feeding them it. These signs may include a reduced appetite, lethargy, and vomiting.  Besides, if your cat is addicted to tuna, you should seek veterinary help. Treatment may involve gradually weaning the cat off of tuna over a period of several weeks or months. This will help to keep your cat healthy and free from any potential health risks associated with an addiction to tuna.

What Else Can Canned Tuna Be Used For?

Canned tuna can be useful in other ways. It can be used to attract and capture stray cats for catch-and-release programs because it has such a strong scent that cats love. If a cat is unwell and/or refuses to eat, a small amount of tuna mixed in with the food could persuade them to eat. Also, a spoonful of tuna has been known to make cats swallow their medicine easily.

Things To Consider When Feeding Your Cat Canned Tuna

It’s very crucial to keep an eye on what’s in the canned tuna. Tuna comes either packed with water or oil. The oil is harmful to cats because it can cause vitamin E depletion, which can lead to muscle problems. As a result, you’ll want to limit your cat to tuna packed in water.

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Also, look over the ingredients. Tuna is available salted or unsalted. Because too much salt might create electrolyte imbalances in cats, only purchase unsalted tuna. You can always add salt to the portions you eat. Onions and garlic are also added to some canned tuna. Cats are poisoned by both.

Other things to pay attention to are if your cat has any allergies to fish because fish allergies are one of the most common cat allergies. And watch out if your cat becomes hooked to the taste of tuna. Most cats really love the taste of tuna and seem to want more of it but always remember it’s detrimental to their health.

Things To Consider When Feeding Your Cat Canned Tuna
tuna is not a healthy diet for cats

Many cat owners have accidentally killed their cats by feeding them canned tuna for a long time. You will eventually kill your cat if you don’t stop feeding your cat tuna more often. There are other foods you can feed your cat if you suddenly run out of cat food other than tuna.

Foods To Feed Your Cat If You suddenly Run Out Of Cat Food

Here are some of the foods that you can feed your cat when you suddenly run out of cat food:

  1. Meat
  2. Fish
  3. Cheese
  4. Bananas
  5. Eggs
  6. Yogurt
  7. Berries
  8. Melon
  9. Oatmeal
  10. Pumpkin
  11. Bread
  12. Apples
  13. Carrots
  14. Rice
  15. Spinach
  16. Nuts
  17. Most vegetables

Your cat can eat almost any meat. Anything with nitrates or too much salt, such as bacon, ham, or hot dogs, should be avoided. If the meat is particularly fatty, reduce the amount and serve with rice to prevent diarrhea. Fat isn’t bad in and of itself, but it’s high in calories and can lead to obesity if consumed on a regular basis.

Eggs are delicious. Because many adult cats, like people, are lactose intolerant, dairy products may induce diarrhea. A small amount of cheese may still be used as a treat or to aid in the absorption of medications.

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Cats will consume a variety of cooked vegetables, but only in moderation and in combination with their meat. Winter squash and pumpkin, both cooked, are popular. Some cats really love cooked carrots. In fact, cooked carrots have caused some cats to go completely crazy. A little amount of nearly any cooked green or starchy vegetable will do.

Instead of feeding your cat canned tuna, these foods can help prevent your dear cat from starving while you go out to get some cat foods the next day.

What Are The Benefits Of Tuna For Cats?

Tuna is a high-quality protein source that can provide moisture and nutritional diversity in addition to being a normal meal. It also has anti-inflammatory properties but feeding your cat tuna as an occasional treat should be done sparingly due to the dangers it poses, as well as the potential for malnourishment from relying on only one food source.

A well-rounded diet for cats typically consists of a variety of healthy food sources.  This can include meats, vegetables, and grains. While canned tuna is generally not recommended as a primary food source for cats due to its high sodium and mercury content, it can be used as a supplemental snack or treat in moderation. 


Is Canned Tuna In Water Good For Cats? 

Canned tuna is not a good source of protein for cats because it has been processed to ensure it is safe for feline consumption. The processing of the tuna reduces the amount of protein that is available for kitties, meaning they need to eat more canned tuna to get the same nutritional value as they would from other sources of protein. You can sleep comfortably knowing that canned tuna is not a good source of protein for your cat. Cats who consume canned tuna in water can experience poor health and even death. 

Why Is Tuna Bad For Cats? 

Tuna is not a part of a cat’s regular diet and is not recommended to be fed to them.  Cats may become addicted to tuna and refuse to eat other food, which can lead to health problems. Tuna is not a healthy food choice for cats because it doesn’t contain all the nutrients they need. This can lead to vitamin E deficiency, yellow fat disease,  and mercury poisoning in some cases.

Can I feed My Cat Tuna Every Day? 

No, cats should not eat tuna every day as a supplement to their diet, and it is important not to give them too much since it is high in sodium and protein and could make them overweight. It is not a good idea to give them tuna every day. Cats can get sick from eating too much tuna because it has high levels of mercury. 

Feeding your cat tuna every day may not be the best decision for their long-term health. It’s important to talk with a veterinarian if you’re concerned about their diet to get more personalized advice for your cat.

Can I Feed My Cat Tuna Out Of The Can?

You can feed your cat tuna out of the can. However, whether you serve your cat tuna out of the can or on a plate, it still doesn’t change the fact that tuna is not a healthy diet for cats. It can cause lots of health issues if you often feed your cat tuna. If you must, only use it as a special treat once in a while.

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Can I Feed My Cat Canned Tuna In Water?

Yes, you can feed your cat canned tuna in water. Canned tuna in water is much preferable to canned tuna in oil. The oil is harmful to cats because it can cause vitamin E deficiency, which can lead to steatitis and muscular issues. Tuna is not good for cats but if you must feed your cat tuna, do it once in a while and stick to canned tuna packed in water.


Can you feed your cat canned tuna? The simplest answer is NO! With all of the reasons, I stated above, giving your cat(s) tuna is not good as it can damage their organs and systems. However, a small amount of tuna as a special treat once in a while isn’t going to hurt them.

Tuna can be useful in other ways. It can be used to attract and capture stray cats for catch-and-release programs because it has such a strong scent that cats love. If a cat is unwell and/or refuses to eat, a small amount of tuna mixed in with the food could persuade them to eat. Always consult your vet before trying anything new with your cat.

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