Many dog owners ask, “do dogs eat tuna?” when they see this fish in their kitchen. Tuna packs lots of protein and omega 3 fatty acids that help your dog’s coat shine. This guide shows both the risks and benefits of feeding tuna to your furry friend. Read on to learn if tuna is safe for your pup.
This guide will help you decide if tuna fits into a healthy dog nutrition plan.
Can Dogs Eat Tuna?
Dogs can eat tuna, but only as a treat now and then and in small amounts. Plain, cooked tuna (canned in water) is safe as an occasional treat, but it should not serve as a main meal since mercury can build up over time.
Veterinarians from our panel and trusted data from akc.org stress that fresh or cooked tuna for dogs should not be a staple in your pet’s diet. The AKC advises against feeding tuna regularly, while Purina and Pawlicy allow small amounts.
Fresh tuna has fewer additives than canned varieties and is a better choice when served plain and fully cooked to avoid parasites in raw fish. Raw tuna also contains thiaminase, an enzyme that breaks down vitamin B1 and may lead to issues like seizures or tiredness.
Our expert review weighs the benefits of omega 3 fatty acids against the risks of mercury build-up.
Is Tuna Safe for Dogs?
Experts explain that tuna is “okay in small amounts” for dogs. The fish gives protein and omega 3 fatty acids that help keep your dog’s skin and coat in good shape. However, be aware that mercury levels can add up over time if given too often.
Simple measures keep your dog safe. Feed tuna only as a rare treat and always opt for cooked tuna for dogs prepared without salt or oil. This way, your dog gets the benefits without undue risk.
Moderation is key when feeding tuna to your furry friend. Over time, excess mercury can lead to health problems down the road.
Small portions served rarely usually do not harm most adult dogs. Fresh tuna contains less salt than canned varieties. Always check with your veterinarian for guidance that fits your dog’s needs.
Potential Risks of Feeding Tuna to Dogs
Tuna can pose serious risks. It carries high mercury levels in fish and extra salt that may impact your dog’s health. Experts note that mercury may damage the brain, kidneys, and nervous system. These dangers may not appear immediately.
You might see symptoms of mercury poisoning such as vomiting, hair loss, or unusual behavior.
Mercury poisoning
Exposure to mercury builds up over time. Initial signs include vomiting or lethargy. More serious cases can affect your pet’s brain and kidneys. Even small amounts over weeks or months can lead to cumulative harm.
It helps to know that larger fish such as albacore tuna may have higher mercury levels compared to smaller fish. This fact makes cautious feeding crucial.
High salt content
Canned tuna often carries extra salt from oil or brine. Many dogs do not process salt as well as humans do. Too much salt can cause thirst, frequent urination, and in extreme cases, sodium ion poisoning. Small breeds are especially at risk because they process salt in smaller amounts.
Maintaining your dog’s kidney health means avoiding foods that supply more salt than needed. A balanced diet sticks to low-sodium food options.
The dangers of both mercury and salt call for careful portioning. Your dog’s safety depends on strict limits.
Mercury Build-Up and Long-Term Effects
Mercury can build up in a dog’s body over time. Even a small serving, given a few times, can add up because the mercury half-life in dogs is about 65 days. This build-up may be more harmful to small dogs, which are more sensitive to toxins.
The effects of mercury may show up as tremors, hair loss, or even vision problems. Over the months, repeated exposure weakens the kidneys, brain, and nerves. Keeping tuna as an occasional treat helps avoid these risks.
Choosing Safer Tuna Options
Not all tuna is the same. Light tuna, like skipjack, has about 0.12 parts per million of mercury, making it a safer choice than albacore tuna which has around 0.35 parts per million. Plain, cooked tuna in water is the best option.
Some commercial dog foods even use tuna to add protein and omega 3 fats . But it is best to stick to small amounts. Both Purina and Pawlicy support a limited intake, although the AKC is more cautious. Using these safer options helps keep your dog in good health.
How Much Tuna Can Dogs Eat?
Dogs should enjoy tuna only as an occasional treat. Experts advise a small bite once or twice a month. For small dogs, a teaspoon is plenty. Medium dogs may have up to a tablespoon, while larger dogs can handle about two tablespoons.
Stick to these modest portions. Your dog gets better nutrition from balanced pet food made for their needs. This simple rule reduces risks and keeps your pet healthy.
Can Puppies and Pregnant Dogs Eat Tuna?
Puppies and pregnant dogs must avoid tuna. Their bodies are still growing or working extra hard, making them more sensitive to toxins. Even small amounts of mercury can interfere with a puppy’s development or cause complications in pregnant dogs.
These groups need extra care with every meal. Safer fish choices like salmon or sardines do not carry the same risks.
Safe Ways to Serve Tuna to Your Dog
When you offer tuna, follow these clear steps to protect your dog:
- Cook all tuna fully to kill any parasites that may lurk in raw tuna for dogs.
- Choose tuna packed in water to avoid extra fat and salt.
- Rinse canned tuna before serving to wash away excessive sodium.
- Remove all bones from fresh tuna to prevent choking or mouth injury.
- Mix small bits of tuna with your dog’s regular food.
- Keep tuna as a tiny part of your dog’s diet—no more than one tablespoon per 20 pounds of body weight weekly.
- Avoid spices or sauces; plain tuna is best.
- Watch for signs of food allergies like itching or upset skin after tuna treats.
- Store leftover tuna in the fridge and use it within two days to maintain freshness.
- Consider low-mercury fish options such as salmon or whitefish as a safer treat.
Types of Fish Dogs Can Safely Eat
Other fish offer great nutrition with lower risk. Many types supply omega 3 fatty acids and protein without the high mercury levels in albacore tuna.
- Salmon – Rich in omega 3 fatty acids for a shiny coat, but serve it fully cooked.
- Whitefish – Low in mercury and high in protein, a favorite among many dogs.
- Flounder – Offers lean protein and is gentle on the stomach.
- Herring – Provides omega 3 fatty acids for brain health; serve fresh or frozen.
- Cod – A mild-tasting fish that many dogs enjoy.
- Arctic Char – Similar benefits to salmon with lower mercury.
- Sardines – These small fish pack essential nutrients and minimal mercury risks when canned in water.
- Pollock – Commonly used in pet food, it supplies protein and healthy fats.
Other Foods Dogs Can and Can’t Eat
Your kitchen harbors many tempting foods. Some items help your dog’s health, while others pose risks. Here is a guide that splits safe foods from harmful ones.
| Safe Foods | Foods to Avoid |
| Plain cooked chicken | Chocolate |
| Carrots | Grapes and raisins |
| Green beans | Onions and garlic |
| Plain peanut butter (xylitol-free) | Xylitol (sweetener) |
| Apples (no seeds) | Avocados |
| Plain white rice | Alcohol |
| Plain yogurt | Caffeine |
| Pumpkin (plain, not pie filling) | Macadamia nuts |
| Eggs (cooked) | Raw eggs |
| Blueberries | Raw dough |
| Watermelon (no seeds) | Corn on the cob |
| Sweet potatoes (cooked) | Dairy (large amounts) |
Many dogs enjoy fruits like bananas and strawberries. These serve as low-calorie snacks when cut into small pieces. Vegetables such as cucumber slices or baby carrots are good for a crunchy treat. One dog even loves frozen green beans on a hot day.
Lean meats are excellent protein sources when carefully prepared. Remove bones, fats, and seasoning before sharing a bite of turkey or beef.
Most nuts are best kept away. They pose choking risks and contain fats that dogs find hard to digest. Macadamia nuts can even trigger severe toxic reactions.
Dairy may suit some dogs in small amounts. Others may suffer an upset stomach. Try very small portions if you share cheese or yogurt.
In some cases, certain foods can create an emergency. Chocolate, grapes, and xylitol require prompt veterinary care. It is best to store these foods in a secure place.
A safe overall approach is to rely on dog food that provides complete nutrition. Use human foods as rare treats and not as a meal replacement. Consistency in diet supports better health outcomes.
Conclusion
Tuna serves as a tasty treat for dogs when given in small amounts. It delivers protein and omega 3 fatty acids that support skin and coat health. Fresh, cooked tuna for dogs without added salt or oil works best.
Watch for signs that your dog may feel unwell. Over time, excess mercury or salt may lead to serious health issues. Safer options like salmon or whitefish provide similar benefits with fewer risks. Always consult your veterinarian if you have questions about your dog’s diet.
Your dog will enjoy smart food choices that keep them healthy and cheerful!
For more insights on your dog’s diet, explore our guide on whether dogs can eat ham.
FAQ
What are the signs of mercury poisoning in dogs?
Dogs may show vomiting, hair loss, strange behavior, changes in vision, or trouble walking. These can be early symptoms of mercury poisoning.
How often can dogs safely have tuna?
Experts recommend giving tuna as a small treat once or twice a month.
What are the benefits of tuna for dogs?
Tuna supplies protein and omega 3 fatty acids that support skin and coat health. It is important to serve it in small portions to avoid dangers like high mercury levels in fish.
Are there safer fish options for dogs?
Yes, options like salmon, whitefish, herring, and sardines have lower mercury and offer many health benefits.
Additional Nutritional Comparison
The table below compares the nutritional value of tuna with other fish options:
- Canned tuna: Offers good protein and omega 3 fatty acids but may carry extra sodium that risks kidney failure and affects cholesterol levels.
- Fresh/cooked tuna: Contains less salt and delivers similar benefits, though the mercury levels in fish remain a concern.
- Salmon and whitefish: Provide comparable nutrition with lower mercury risks, making them a safer choice.
- Sardines: These small seafood products offer plenty of essential vitamins and minerals with minimal mercury when canned in water.
About DoDogsEat.com
DoDogsEat.com helps dog owners decide what foods are safe for their pets. Our team of experienced dog lovers and pet nutrition experts has worked for over 10 years in dog nutrition. Staff members include board-certified veterinary nutritionists.
We review scientific articles and reliable resources such as akc.org. Our content comes from a process of careful research and peer review to ensure accuracy.
We also share practical charts, clear tips, and easy explanations. Information is presented with a mix of expert insight and everyday knowledge, so you learn and smile along the way.
Disclosure: The information provided is for informational purposes only and is not a substitute for professional veterinary advice.
