Can Jack Russells Eat Fish?

can jack russells eat fish

Yes, Jack Russells can eat fish. There are many health benefits associated with this kind of food. For one, adding fish to your dog’s diet can provide him with omega-3 fatty acids. These essential fatty acids help support immune function, joint health, heart health, and brain development in pups. Feeding your Jack Russell fish oil can also help maintain healthy skin and coat.

Benefits of feeding fish to your Jack Russell

1. Omega-3 fatty acids

2. Stabilizes your Jack Russell’s skin and coat

3. Eases the pain of arthritis in older dogs

4. Strengthens your Jack Russell’s immune system

5. Supports your dog’s heart health and brain development

6. Promotes healthy eyes

Types of fish to feed your Jack Russell

Feeding fish to your Jack Russell is a very healthy practice, but you will need to make sure that you are buying the right kind of fish for dogs. Your vet can give you an idea of what kind of fish is best for your dog, but he will most likely recommend salmon or tuna.

1. Salmon

Salmon is a very healthy kind of fish to feed your Jack Russell. It is rich in omega-3 fatty acids and protein. Salmon also provides your dog with a good amount of vitamin B6, niacin, vitamin B12, and selenium.

2. Tuna

Just like salmon, tuna is rich in omega-3s and other vitamins and minerals. Although Jack Russells can eat tuna (assuming that they don’t have a seafood or tuna allergy), tuna has less nutritional benefits than salmon does because it lacks protein.

3. Mackerel

Mackerel is a unique kind of fish that should be fed to your Jack Russell in moderation. It contains substances that can decrease blood clotting, as well as other nutrients. In fact, mackerel contains the highest concentration of vitamin B12 out of all the fishy foods on this list.

4. Herring

Herring is also packed with essential fatty acids and other nutrients. It makes for a good substitute for your Jack Russell’s regular food, though it will probably only be given as an occasional treat.

5. Sardines

Sardines contain a lot of vitamin B12, which is why they should only be given in moderation due to their high mercury content. You should also avoid feeding your dog sardines if he has an existing enzyme deficiency or liver problem since the fish can make his condition worse.

How much fish to feed your Jack Russell

There are some things that you should consider when feeding fish to your Jack Russell. You do not want your dog to become overweight. Feed your pup the right amount so that he can stay healthy and full of energy.

You will know if you are feeding him too much or too little by the way that he acts, his energy level, his coat, and his weight in general. So if you notice any of these signs or symptoms, make changes as needed. If you see improvements, then you should continue with those changes for the best results possible.

Risks of Feeding Fish to Dogs

There are some potential risks associated with feeding fish to dogs. Be sure to talk to your vet before you add fish to your Jack Russell’s diet so that he can determine the best kind of fish for your pup and how much he should be eating each day. He will also ensure that your dog does not have any allergies to this type of food or any other ingredient or food that you are feeding him.

1. Mercury

Methylmercury is a chemical found in fish. It gets in the water when humans package it for storage, process it for food, and store it before distribution. When ingested, methylmercury can cause serious health issues for your dog. Vets recommend that you avoid feeding your dog fish containing high levels of mercury for this reason.

You should also keep an eye on the mercury levels of the fish that you feed your dog if he is a frequent consumer of fish. Mercury toxicity can cause serious problems like tremors, muscle spasms and weakness, heart trouble, neurological disorders, vision impairment, and problems with balance and coordination.

2. Sodium

Fish like salmon, tuna, and whitefish are high in sodium. The recommended daily amount of sodium for an adult Jack Russell is around 50 mg depending on the dog’s weight. But if your dog eats too much fish, the sodium could leave him dehydrated. Just like people, dogs can suffer from high blood pressure.

If they eat too much salty fish regularly, it can cause their blood pressure to be higher than normal resulting in serious problems like heart failure or strokes. So be sure to keep an eye on the amount of fish that your Jack Russell is eating each day to prevent these issues from becoming a problem down the road.

3. Fish oil

Fish oil is very popular with people. It is recommended for heart health and to reduce the risk of inflammation among other issues. While it is good for you, it can be dangerous for your dog. Talk to your vet about the fish oil supplements that you are taking because some of them may contain mercury. Even if the source of fish oil does not contain mercury, your dog could still consume enough through his diet or supplements to potentially cause a problem.

This is why it is important to talk to your veterinarian before giving any supplement or dietary change to your Jack Russell. Your vet will be able to help you determine if the benefits of the supplement outweigh the risks of giving it to him.

4. Fish bones

Fish bones are very dangerous for dogs to consume. As mentioned, these small, brittle bones can be difficult for your dog to digest and can lodge in his throat, stomach, or intestines resulting in an expensive trip to the vet and possible surgery. While dogs have been known to digest fish bones without issue, it is better to play it safe than sorry.

5. Raw fish

Raw fish is something you should never feed your dog. Raw fish can cause your dog to become sick with diseases like salmonella. While dogs are far less susceptible to salmonella than humans, they can still become sick from it.


Overall, fish is a healthy kind of food that should be included in your Jack Russell‘s diet. However, you will have to remember that there are limits to what is safe for dogs. When feeding fish, always make sure that you do not go over the recommended daily amount and that the fish doesn’t smell bad or taste weird. If it does smell bad or tastes weird, it’s probably not good for your dog and should be avoided at all costs.


  • Jan Pretorius

    Meet Jan Pretorius, the passionate dog lover and proud owner of the popular canine haven, Born and raised in a small town known for its love of animals, Jan’s journey into the world of dogs began at a young age, fueled by an innate connection with our four-legged companions.