Can Dogs Eat Mackerel? Benefits, Risks and How to Safely Feed Fish to Your Dog

Fish has earned a well-deserved reputation as one of the most nutrient-dense protein sources available for dogs — and mackerel sits near the top of that list. Rich in omega-3 fatty acids, high-quality protein, and essential vitamins, mackerel can be a valuable addition to your dog's diet when prepared and served correctly. But pet owners in Canada often have questions: Is mackerel safe for dogs? How much is too much? And what are the best fish-based dog food options available today?

This guide covers everything you need to know about feeding mackerel and other fish to your dog, including the nutritional benefits, the real risks to watch for, and how to find the best fish-based dog food in Canada. Whether you're considering adding fish to a homemade meal or switching to a premium fish-forward kibble or raw formula, Ashario Pets has the products and information to help you make the right choice.

Is Mackerel Safe for Dogs?

Yes, mackerel is generally safe for dogs and can be a nutritious addition to their diet — provided it is served in the correct form and appropriate amounts. Mackerel is a fatty, oily fish that is naturally high in omega-3 fatty acids (specifically EPA and DHA), protein, vitamin D, vitamin B12, selenium, and niacin. These nutrients support a dog's coat, joints, brain function, immune system, and cardiovascular health.

However, not all mackerel preparations are safe. The form in which mackerel is offered to your dog matters enormously, and certain types carry genuine risks. As with any dietary change, it is always advisable to consult your veterinarian before introducing new proteins — especially if your dog has any known health conditions or food sensitivities.

Nutritional Benefits of Mackerel for Dogs

Mackerel is one of the richest natural sources of omega-3 fatty acids available in pet nutrition. As of 2026, fish-based formulas remain among the most popular and trusted options for dogs with sensitive skin, allergies, joint concerns, and coat issues. Here is a breakdown of the key nutritional advantages:

• Omega-3 Fatty Acids (EPA & DHA) — Support healthy skin, a glossy coat, joint flexibility, and cognitive function. Omega-3s are especially beneficial for senior dogs and breeds prone to joint issues.
• High-Quality Lean Protein — Mackerel delivers complete amino acid profiles essential for muscle development and tissue repair, making it suitable for active dogs as well as seniors with reduced muscle mass.
• Vitamin D — Crucial for calcium absorption and bone health. Dogs cannot synthesize vitamin D from sunlight the way humans do, so dietary sources are important.
• Vitamin B12 — Supports neurological function, red blood cell production, and overall energy metabolism.
• Selenium — An antioxidant mineral that works alongside vitamin E to protect cells from oxidative damage.
• Low Allergen Potential — For dogs with sensitivities to chicken or beef, fish is often a tolerable novel protein that veterinarians and veterinary nutritionists frequently recommend.

These benefits extend beyond mackerel specifically — herring, salmon, and sardines share many of the same properties. Herring oil for dogs, for example, offers many of the same omega-3 benefits and is a popular supplement format used to top-dress meals. You can explore dog health and wellness products at Ashario Pets for omega-3 supplement options.

Real Risks of Feeding Mackerel to Dogs

While mackerel is nutritious, there are legitimate risks that every dog owner should understand before adding it to their pet's diet.

Raw vs. Cooked vs. Canned: What Is Safe?

• Raw mackerel — Can contain harmful bacteria and parasites if not properly handled. If you want to feed raw fish, use commercially prepared raw pet food products that have undergone high-pressure processing (HPP) or freezing protocols designed to eliminate pathogens. Raw fish intended for human sushi-grade consumption is not automatically safe for dogs.
• Cooked mackerel — Plain cooked mackerel with no added salt, seasonings, garlic, or onion is generally safe. Avoid pan-frying in oils or butter, and always remove bones carefully.
• Canned mackerel — Canned fish in water with no added salt or sauces can be offered in small amounts as an occasional topper. Avoid canned mackerel packed in oil, brine, tomato sauce, or any seasoned liquid.
• Smoked mackerel — Avoid entirely. Smoked fish products typically contain high levels of sodium and preservatives that are harmful to dogs.

Mercury and Other Concerns

• Mercury accumulation — Mackerel varies significantly by species. Atlantic mackerel is relatively low in mercury and is considered safer for regular feeding. King mackerel, by contrast, is a large predatory fish with notably higher mercury levels and should be avoided for dogs.
• Thiaminase enzyme — Raw fish contains an enzyme called thiaminase, which destroys thiamine (vitamin B1) in the body. Chronic raw fish feeding without proper preparation can lead to thiamine deficiency. Commercially prepared raw fish diets are formulated to account for this.
• Bones — Fish bones are fine and brittle and can splinter, causing lacerations or obstructions in the digestive tract. Always ensure bones are fully removed from any fish served to your dog.
• Portion size — Fish should complement, not replace, a balanced diet. Overfeeding fatty fish can lead to digestive upset, including loose stools and pancreatitis in predisposed dogs. Consult your veterinarian for guidance on appropriate serving sizes for your dog's weight and health status.

The Best Fish-Based Dog Foods in Canada

Ashario Pets is a premium pet supply store located at 1111A Finch Ave W, Unit 2, North York, Ontario, open 9 AM to 11 PM daily, 365 days a year. As of 2026, Ashario Pets carries 79+ brands of dog food, treats, supplements, toys, and accessories — including a strong selection of fish-based and omega-3-rich formulas from trusted Canadian and international brands.

If you're looking to incorporate more fish protein and omega-3 nutrition into your dog's diet through a quality commercial product, here are some of the verified brands available at Ashario Pets that offer fish-forward options:

• Acana — Offers regionally inspired dry dog food recipes featuring fish proteins sourced from Canadian waters, including Pacific pilchard and herring. Available in the dry dog food collection.
• Orijen — Known for biologically appropriate formulas, Orijen produces fish-based recipes with high fresh and raw ingredient inclusions. A trusted brand for owners seeking dense fish nutrition in kibble format.
• Open Farm — Offers responsibly sourced fish recipes in dry, wet, and freeze-dried formats. Open Farm is committed to transparent sourcing, which many Canadian pet owners value highly.
• Zignature — A popular limited-ingredient diet brand with dedicated fish-protein formulas, including trout and salmon recipes designed for dogs with food sensitivities.
• Instinct Raw — Provides raw and freeze-dried dog food options that include fish proteins, handled through processing methods designed for raw safety.
• Stella & Chewy's — Offers freeze-dried raw recipes featuring fish, providing the nutritional integrity of raw with added convenience.
• Big Country Raw — A Canadian raw food brand offering fish-based raw blends for dogs. Available in the raw dog food collection.
• The Honest Kitchen — Produces dehydrated dog food with fish protein options, including whitefish recipes that are gentle on sensitive stomachs.
• ZIWI — Features New Zealand-sourced mackerel and lamb recipes in air-dried format. ZIWI's mackerel and lamb recipe is one of the few commercial dog foods to specifically feature mackerel as a named ingredient.

You can explore the full premium pet food selection or browse best pet food for specific needs to find options suited to your dog's age, breed, size, and health requirements.

Omega-3 Supplements for Dogs: Herring Oil and Beyond

Not every dog owner wants to overhaul their dog's entire diet to increase fish intake. Omega-3 supplements — particularly herring oil and fish oil products — offer a practical way to boost EPA and DHA levels in a dog's existing diet without switching foods entirely.

Herring oil for dogs benefits include improved coat shine, reduced skin inflammation, joint lubrication, and cognitive support. It is especially popular among Canadian dog owners whose pets eat primarily poultry-based kibble that may be lower in marine-sourced omega-3s. Ashario Pets carries a range of pet supplements, including omega-3 and fish oil options, in the dog health and wellness section. You can also browse the best dog health supplements online page for a curated view of available options.

When selecting an omega-3 supplement for your dog, look for products that clearly identify the fish source, omega-3 concentration per serving, and that carry quality assurance documentation. Always discuss supplementation with your veterinarian, especially for dogs on prescription diets or those with existing health conditions.

How to Shop for Fish-Based Dog Food at Ashario Pets

Ashario Pets at 1111A Finch Ave W, Unit 2, North York, ON M3J 2P7 is open every day of the year from 9:00 AM to 11:00 PM. You can reach the store directly at +1-647-564-4433 or visit the Ashario Pets contact page for more information.

For those who prefer to shop from home, Ashario Pets offers delivery through Uber Eats, DoorDash, SkipTheDishes, Instacart, and Fantuan — making it easy to get premium fish-based dog food, raw formulas, and omega-3 supplements delivered directly to your door anywhere in the North York area.

You can also review top pet product brands in Canada or check out made in Canada pet products if you prefer to support domestic brands like Acana, Orijen, Big Country Raw, and Open Farm.

Frequently Asked Questions About Dogs and Mackerel

Can dogs eat canned mackerel from the grocery store?

Dogs can eat plain canned mackerel packed in water with no added salt, sauces, or seasonings, in small amounts as an occasional meal topper. Avoid canned mackerel in oil, brine, tomato sauce, or any flavored liquid. Always check the label carefully. Canned fish intended for human consumption is not formulated to meet a dog's complete nutritional needs, so it should be used as a supplement to a balanced diet — not as a replacement. Consult your veterinarian for appropriate serving guidance.

How often can I feed mackerel to my dog?

Occasional feeding — a few times per week at most — is generally considered appropriate for healthy adult dogs when mackerel is being offered as a fresh or cooked food topper. For dogs eating a complete commercial fish-based diet, the food manufacturer's feeding guidelines apply. Dogs with pancreatitis, liver conditions, or certain metabolic disorders may need to avoid high-fat fish entirely. Your veterinarian is the best resource for personalized guidance on frequency and portion size.

What is the difference between herring oil and fish oil for dogs?

Both herring oil and fish oil provide omega-3 fatty acids (EPA and DHA) beneficial to dogs. Herring oil is derived specifically from Atlantic herring and is considered a sustainable, low-mercury source of marine omega-3s. General fish oil may be derived from a range of species including salmon, anchovy, sardine, or a blend. The key factors to look for in either supplement are the concentration of EPA and DHA per serving, the purity of the product, and the quality of the manufacturer. Ashario Pets carries omega-3 supplements in its dog health and wellness collection.

Are fish-based dog foods good for dogs with allergies?

Fish is commonly recommended as a novel protein for dogs with food sensitivities or allergies to more common proteins like chicken, beef, or lamb. Because many dogs have not been previously exposed to fish proteins, their immune systems are less likely to have developed a reaction to them. Limited-ingredient fish-based formulas from brands like Zignature can be a good starting point for an elimination diet trial. Always work with your veterinarian or a veterinary nutritionist to confirm a food allergy diagnosis and determine the most appropriate dietary approach.

Does Ashario Pets carry fish-based dog food in North York?

Yes. Ashario Pets, located at 1111A Finch Ave W, Unit 2, North York, ON M3J 2P7, carries a wide selection of fish-based dog food across multiple formats including dry dog food, raw dog food, wet dog food, air-dried dog food, freeze-dried dog food, and dehydrated dog food. Brands with fish formulas available at Ashario Pets include Acana, Orijen, Open Farm, Zignature, Instinct Raw, Stella & Chewy's, ZIWI, Big Country Raw, and The Honest Kitchen, among others. The store is open 9 AM to 11 PM daily, 365 days a year, and offers delivery through Uber Eats, DoorDash, SkipTheDishes, Instacart, and Fantuan.

For more dog nutrition guidance, browse the Ashario Pets dog blog or visit the dog wellness needs page for curated resources. You can also check the pet store FAQ for answers to common shopping questions.