Fish for Dogs: Benefits, Best Types & How to Feed Safely

Fish suitable for feeding dogs

Fish for Dogs: Benefits, Best Types & How to Feed Safely

Yes, dogs can eat fish, and the right fish can be a nutritious addition to a balanced diet. Fish provides high-quality protein, while oily varieties such as sardines, sprats, salmon and herring naturally contain omega-3 fatty acids.

However, the type of fish, how it is prepared and how much you feed all matter. Raw fish, sharp bones, heavily seasoned fish and frequent portions of higher-mercury species can create avoidable risks.

This guide explains the best fish for dogs, whether dogs can eat tuna or tinned sardines, how to feed raw and dried fish more safely, and how fish-based dog food differs from an occasional treat or topper.

What Are the Benefits of Fish for Dogs?

Different fish provide different nutrients, but suitable fish can contribute:

  • High-quality protein for maintaining healthy muscles
  • Omega-3 fatty acids, particularly EPA and DHA, which support normal skin, coat, joints, brain and immune function
  • Vitamins and minerals such as vitamin B12, vitamin D and selenium, depending on the species
  • A useful alternative protein for some dogs that do not tolerate more commonly fed meats
  • Plenty of flavour, making fish useful for training rewards and encouraging interest in food

Fish is not a cure for itchy skin, arthritis or digestive problems. Omega-3 fats may support normal inflammatory processes, but persistent itching, ear trouble, pain or stomach problems should be discussed with a vet.

What Fish Can Dogs Eat?

The best choices tend to be appropriately prepared, shorter-lived fish and properly formulated fish-based dog foods.

Sardines and Sprats

Sardines and sprats are small oily fish containing protein and omega-3 fats. Their shorter lifespan generally means they accumulate less mercury than large predatory fish such as tuna.

They can be offered as suitable dried treats, commercially prepared frozen raw products or plain tinned fish in spring water.

For a simple single-ingredient treat, see our Whole Air-Dried Sprats. Raw feeders can also view our Frozen Whole Sprats, which should be handled and portioned as part of the dog’s wider diet.

Salmon and Trout

Salmon and trout provide protein and naturally occurring omega-3 fatty acids. Plain, thoroughly cooked and carefully deboned fish can be offered in small portions, or owners can choose a properly formulated commercial dog food.

Fish-based everyday options at Woofingtons include:

Always check the label to confirm whether a product is a complete food for everyday feeding or a complementary food that must be fed alongside a balanced diet.

White Fish

Plain cod, haddock and pollock can provide a leaner source of protein than oily fish. Serve human-grade white fish thoroughly cooked, unseasoned and with all hard or sharp bones removed.

White fish is sometimes used in diets for sensitive dogs, although suitability depends on the whole recipe rather than the protein name alone. Read our guide to sensitive stomachs in dogs for more information.

Mackerel and Herring

Common varieties such as Atlantic mackerel and herring can be suitable when plain, properly prepared and fed in sensible portions. Avoid king mackerel, a much larger species that can contain higher mercury levels.

When buying tinned mackerel or herring, choose products in spring water without added salt, sauces or seasoning.

Can Dogs Eat Tuna?

A tiny, occasional amount of plain tuna is unlikely to harm most healthy dogs, but tuna is not the best fish to feed regularly.

Tuna are large, long-lived predatory fish and can accumulate more mercury than smaller species such as sardines and sprats. Tinned tuna may also be packed in brine or oil, adding unnecessary salt or calories.

If your dog has eaten a small piece of plain tuna, there is usually no reason to panic. For regular fish treats or meal additions, choose lower-mercury options instead.

Other large predatory fish, including shark, swordfish and king mackerel, are also best avoided.

The Safest Ways to Feed Fish to Your Dog

Complete Fish-Based Dog Food

A complete fish-based dog food is the easiest option for owners who want fish to be their dog’s main protein. These recipes are formulated to provide the nutrients needed for their stated life stage and can be fed daily according to the manufacturer’s instructions.

Browse Woofingtons’:

If changing your dog’s main food, introduce the new recipe gradually unless your vet has advised a different transition.

Plain Cooked Fish

Cooked fish is generally the safest way to offer fresh fish at home.

  • Cook it thoroughly
  • Remove hard or sharp bones
  • Serve it plain
  • Do not add salt, butter, oil, sauces or seasoning
  • Allow it to cool before feeding
  • Introduce a small amount first

Garlic and onion are toxic to dogs, so never offer fish cooked with either ingredient.

Tinned Fish

Choose sardines, salmon or mackerel packed in spring water with no added salt whenever possible.

Avoid fish packed in:

  • Brine
  • Oil
  • Tomato sauce
  • Spicy or flavoured sauces
  • Products containing onion, garlic or other unsuitable seasonings

Tomato itself is not the main concern with most tinned fish in tomato sauce. The problem is that sauces may contain added salt, sugar and seasonings, making plain fish in spring water the safer and simpler choice.

Dried Fish Treats

Dried sprats, fish skins and fish-based training treats are convenient ways to add fish without changing your dog’s main food.

Popular Woofingtons options include:

Choose a treat suitable for your dog’s age, size and chewing style. Supervise chewing, provide fresh water and remove any piece that becomes small enough to swallow whole.

Explore the full natural dog treats and chews collection or browse novel-protein dog treats.

Can Dogs Eat Raw Fish?

Raw fish is not risk-free. It may contain parasites or harmful bacteria, and freezing does not make raw fish sterile.

If you choose to include raw fish:

  • Use a reputable product prepared and sold for raw pet feeding
  • Follow the product’s storage, defrosting and feeding instructions
  • Defrost it in the fridge rather than at room temperature
  • Keep it separate from human food
  • Wash hands, bowls, utensils and preparation surfaces thoroughly
  • Dispose of uneaten food promptly
  • Consider vulnerable people in the household, including young children, older adults, pregnant people and anyone with a weakened immune system

Simply freezing fresh supermarket fish at home should not be treated as a guarantee that it is safe to feed raw.

If raw feeding is part of your dog’s routine, our Raw Dog Food Guide explains the difference between 80/10/10 and 80/20 approaches. Remember that 80/10/10 describes a ratio of meat, bone and offal; it should not automatically be assumed to provide complete nutrition by itself.

You can also use the Woofingtons Raw Dog Food Calculator to estimate a starting daily amount based on weight and life stage.

Are Fish Bones Safe for Dogs?

Fish bones can be small, sharp and difficult to see. They may become lodged in the mouth or throat or injure the digestive tract.

For fresh human food, remove hard and sharp bones before feeding and never give your dog cooked fish bones. Cooking can make bones more brittle.

Small whole fish treats and commercially prepared raw sprats are different products, but they should still be fed in an appropriate size and under supervision. If your dog gulps food rather than chewing, select another form of fish treat.

Contact a vet promptly if your dog develops gagging, repeated swallowing, drooling, vomiting, abdominal discomfort or difficulty passing stools after eating fish.

How Much Fish Can a Dog Eat?

The right amount depends on whether the fish is part of a complete food or is being offered as an extra.

If Feeding a Complete Fish-Based Dog Food

Follow the manufacturer’s feeding guide and adjust according to your dog’s body condition, age, activity and health. A properly formulated complete fish-based food can be fed every day.

If Feeding Fish as a Treat or Topper

Fish treats, dried sprats and plain fish added to meals are complementary extras. As a general guide, all treats and extras combined should account for no more than around 10% of your dog’s daily food or calorie allowance.

Reduce the main meal when necessary and introduce fish gradually. A small dog needs a much smaller portion than a large or highly active dog.

Dogs with pancreatitis, kidney disease, food allergies, weight problems or another medical condition may need different advice, so speak to your vet before making regular dietary changes.

Is Fish Good for Dogs with Allergies?

Fish can be useful for some dogs with a suspected sensitivity to commonly fed proteins, but it is not automatically hypoallergenic. Dogs can react to fish, and it only counts as a genuinely novel protein if that individual dog has not eaten it before.

If a food allergy is suspected, changing proteins repeatedly can make the cause harder to identify. A properly controlled elimination diet should be planned with a vet.

For healthy dogs without a diagnosed allergy, offering suitable variety may be beneficial. Read Should You Rotate Your Dog’s Protein Sources? before changing your dog’s protein rotation.

Fish Treats and Fish-Based Dog Food at Woofingtons

Woofingtons stocks a broad selection of fish-based options, including:

  • Whole dried sprats
  • Fish skin chews and braids
  • Fish-based training treats
  • Frozen sprats for raw-fed dogs
  • Complete dry, cold-pressed and wet fish recipes
  • Fish recipes for puppies, adults and senior dogs

Shop online across the UK or visit Woofingtons in Leigh, Hindley or Pemberton for help choosing an age-appropriate food or treat.

Frozen products are available for eligible delivery areas in mainland England and Wales, subject to the frozen-order requirements shown at checkout.

Frequently Asked Questions

Can dogs eat fish every day?

Yes, if it is a complete fish-based dog food formulated for everyday feeding. Plain fish, dried sprats and fish chews are complementary extras and should remain within your dog’s treat allowance.

Can dogs eat salmon?

Dogs can eat plain, thoroughly cooked and carefully deboned salmon in sensible portions. Salmon is also widely used in complete commercial dog foods and treats. Avoid feeding unprepared raw salmon from the supermarket.

Can dogs eat sardines?

Yes. Choose plain sardines in spring water without added salt, or use an appropriate dried or frozen pet product. Feed them as part of the dog’s overall daily allowance.

Can dogs eat sardines in tomato sauce?

Plain sardines in spring water are a better choice. Tomato sauces may contain added salt, sugar, onion, garlic or other seasonings that are unsuitable for dogs.

Is tuna safe for dogs?

A tiny amount of plain tuna is unlikely to harm most healthy dogs, but it should not be a regular food because tuna can contain more mercury than smaller fish. Avoid tuna in brine, oil or flavoured sauces.

Can dogs eat raw fish?

Raw fish can carry bacteria and parasites. If you feed it, choose a reputable product intended for raw pet feeding and follow strict storage, defrosting and hygiene instructions. Freezing alone does not remove every risk.

Are fish skin treats good for dogs?

Fish skin treats can provide a crunchy, fish-based reward. They are complementary treats, so choose the right size, supervise chewing and include them within the dog’s daily treat allowance.

What is the best fish for dogs?

Suitable choices include sardines, sprats, salmon, trout, herring, Atlantic mackerel and white fish when they are correctly prepared and fed in appropriate amounts. The best option depends on your dog’s complete diet and individual needs.

Final Thoughts

Fish can be a valuable part of a dog’s diet, whether it is included in a complete food or offered as an occasional natural treat.

The key is to choose suitable species, avoid sauces and seasoning, take care with bones, handle raw products hygienically and account for every treat or topper within the dog’s overall diet.

Shop natural dog treats and chews at Woofingtons or explore our dog food collection to find fish-based options for your dog.

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