Herring Oil for Dogs: Benefits, Correct Dosage and Best Canadian Brands

Herring oil for dogs is one of the most talked-about omega-3 supplements in the Canadian pet care market — and for good reason. Derived from cold-water Atlantic herring, this fish oil is packed with EPA and DHA fatty acids that support skin health, coat shine, joint mobility, immune function, and cardiovascular wellness in dogs of all ages and breeds. As of 2026, pet owners across Canada are increasingly turning to herring oil as a targeted, high-quality alternative to generic fish oil blends. This guide breaks down the real science behind herring oil, how to dose it correctly, and which verified Canadian brands deliver the best results.

If you're searching for fish oil supplements for dogs in Canada, Ashario Pets at 1111A Finch Ave W, Unit 2, North York, Ontario is open 9 AM to 11 PM daily, 365 days a year, and carries a curated selection of premium omega-3 dog supplements from trusted brands.

What Is Herring Oil and Why Is It Different from Other Fish Oils?

Herring oil is a marine-derived supplement extracted from Atlantic herring, a cold-water fish that is naturally high in omega-3 fatty acids — specifically eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These two fatty acids are biologically active and play critical roles in a dog's inflammatory response, neurological development, skin barrier function, and joint lubrication.

Not all fish oils are equal. The source of the oil matters significantly. Here's how herring oil compares with other commonly discussed fish oil sources:

• Herring oil — Cold-water sourced, naturally high in EPA and DHA, lower on the food chain which typically means lower contaminant accumulation, mild odour that dogs tend to accept well
• Salmon oil — Also high in omega-3s, widely popular, but sourced from larger fish which may accumulate more environmental toxins; generally higher in palatability for picky eaters
• Sardine/anchovy oil blends — Often used in multi-source fish oil products; a common base in commercial omega-3 supplements
• Cod liver oil — Contains omega-3s but also high levels of vitamins A and D, which can become toxic in excessive doses; not recommended as a standalone supplement for most dogs without veterinary guidance

Herring oil's position low on the marine food chain is one of its most cited advantages. Fish lower on the food chain tend to accumulate fewer heavy metals and persistent organic pollutants compared to larger predatory fish. For pet owners who prioritize purity, herring oil is a strong consideration.

Key Benefits of Herring Oil for Dogs

Omega-3 fatty acids from herring oil support several body systems in dogs. The following benefits are among the most widely recognized by veterinary nutrition researchers, though individual results will vary and pet owners should always consult a veterinarian before starting any new supplement regimen.

Skin and Coat Health

One of the most visible effects of consistent omega-3 supplementation is improved coat quality. Dogs with dull, dry, or flaky coats often show notable improvement within several weeks of regular supplementation. EPA and DHA help maintain the skin's lipid barrier, which reduces moisture loss and can help manage environmental allergies that manifest as itchy or inflamed skin. Always speak with your vet if your dog shows persistent skin issues — supplements support wellness but are not a substitute for veterinary care.

Joint and Mobility Support

EPA in particular has well-documented anti-inflammatory properties that may help reduce discomfort associated with joint stiffness in aging or active dogs. For senior dogs or large breeds prone to mobility challenges, herring oil is frequently recommended alongside other joint-support strategies. If your dog shows signs of joint pain or reduced mobility, consult your veterinarian before adjusting their supplement plan.

Cardiovascular and Immune Function

DHA and EPA work together to support healthy cardiovascular function and a balanced immune response. Research in veterinary nutrition consistently supports the role of omega-3 fatty acids in maintaining heart muscle health in dogs, particularly in breeds with known cardiac sensitivities. Again, always seek professional veterinary guidance for dogs with diagnosed heart conditions.

Brain and Eye Development

DHA is a structural component of brain and retinal tissue. For puppies and young dogs, adequate DHA intake supports neurological development and cognitive function. Many premium puppy foods and kitten formulas already include DHA, but supplementation with herring oil can be beneficial in some cases — discuss this with your veterinarian to determine whether it's appropriate for your growing dog.

Herring Oil vs Salmon Oil for Dogs: Which Should You Choose?

The debate between herring oil and salmon oil for dogs comes up frequently among Canadian pet owners, and both are legitimate choices. The key differences come down to sourcing position in the food chain, flavour profile, and specific fatty acid ratios. Herring oil tends to have a slightly higher EPA concentration relative to DHA compared to some salmon oils, which may make it a better fit for dogs who primarily need anti-inflammatory support. Salmon oil often has stronger palatability with very picky dogs, though many dogs accept herring oil equally well.

Some premium supplement products blend multiple fish oil sources to provide a broader fatty acid profile. Ultimately, the best fish oil supplement for your dog depends on their individual health needs, ingredient sensitivities, and veterinary recommendations. Explore our dog wellness needs guide for more information on building a complete supplement plan.

Correct Dosage: How Much Herring Oil Should You Give Your Dog?

Dosage is one of the most important and most misunderstood aspects of fish oil supplementation for dogs. More is not always better — excessive omega-3 intake can interfere with blood clotting and cause gastrointestinal upset. The following general guidelines are educational only and should always be confirmed with your veterinarian before starting supplementation.

• Small dogs (under 10 kg) — General starting range is approximately 250–500 mg combined EPA + DHA daily
• Medium dogs (10–25 kg) — General starting range is approximately 500–1000 mg combined EPA + DHA daily
• Large dogs (25–45 kg) — General starting range is approximately 1000–2000 mg combined EPA + DHA daily
• Giant breeds (over 45 kg) — A veterinarian should guide dosing at this range as individual needs vary significantly

When reading product labels, look for the actual EPA and DHA content listed in milligrams per serving — not just the total fish oil volume. A product may list "1000 mg of herring oil" per capsule but contain only 300 mg of combined EPA + DHA. The EPA + DHA figure is what matters for dosing purposes.

Start with a lower dose and gradually increase over one to two weeks to reduce the risk of digestive upset. If your dog experiences loose stools, reduce the dose. Always store herring oil products in a cool, dark place or refrigerate after opening to prevent oxidation.

Best Canadian Brands Carrying Herring Oil and Omega-3 Supplements for Dogs

As of 2026, Ashario Pets — located at 1111A Finch Ave W, Unit 2, North York, ON M3J 2P7 — carries a verified selection of premium dog health and wellness supplements from trusted Canadian and international brands. When shopping for herring oil or omega-3 supplements, look for products with transparent sourcing, third-party testing, and clear EPA/DHA labelling.

Brands available at Ashario Pets that offer omega-3 and marine-based supplement products for dogs include:

• Canine Matrix — Functional supplement blends for dog wellness, available in the dog health and wellness collection
• MOJO Pet Supplements — Targeted dog supplement products designed to support joint, coat, and overall health
• Wellytails — Canadian-made supplement brand focused on natural ingredients for dog wellness
• Carna4 — Canadian brand known for nutrient-dense formulations; some products incorporate whole food omega sources
• The Honest Kitchen — Whole food supplement products with natural ingredient sourcing including marine-based options
• Pawtanical — Natural supplement brand with a focus on plant and marine-derived wellness products for dogs

Browse our full dog health and wellness collection or visit our best dog health supplements page to explore available options. You can also check our made in Canada pet products page if you prefer to support Canadian-manufactured supplements.

How to Introduce Herring Oil Into Your Dog's Diet

Transitioning your dog to a new supplement is straightforward when done gradually. Start by adding a small amount of herring oil to your dog's regular food — whether that's dry food, raw food, wet food, or a mixed diet. Many dogs accept the flavour without hesitation; others may need a slower introduction mixed into a favourite food.

Liquid herring oil can be drizzled directly over kibble or raw food. Capsule forms can be punctured and squeezed over food or given whole as a treat for dogs that accept them. Store-bought products from verified brands will include serving size instructions on the label — follow those guidelines and adjust based on your veterinarian's recommendations.

If your dog is currently on any medications, especially blood thinners or anti-inflammatory drugs, speak with your veterinarian before adding fish oil supplements, as interactions are possible. For more general guidance on building a complete wellness plan, visit our best pet food for specific needs page.

Frequently Asked Questions: Herring Oil for Dogs in Canada

Is herring oil safe for all dogs?

Herring oil is generally considered safe for most healthy adult dogs when given at appropriate doses. However, dogs with bleeding disorders, those scheduled for surgery, or dogs on certain medications should not take fish oil supplements without explicit veterinary approval. Always consult your veterinarian before introducing any new supplement, including herring oil.

How is herring oil different from regular fish oil supplements for dogs?

Herring oil comes specifically from Atlantic herring, a small cold-water fish low on the marine food chain. This sourcing position typically means lower accumulation of heavy metals compared to larger predatory fish. Generic fish oil blends may use a combination of anchovy, sardine, mackerel, or salmon sources. Herring oil products offer a single-source option with consistent fatty acid profiles.

Can I give my dog human-grade herring oil capsules?

While human-grade fish oil is not toxic to dogs in small amounts, pet-specific formulations are preferred because they are dosed appropriately for canine body weight and do not contain additives like vitamin E fillers or artificial flavours in concentrations that may be inappropriate for dogs. Look for products specifically formulated and labelled for dogs to ensure correct dosing and ingredient safety.

Where can I buy herring oil supplements for dogs in North York?

Ashario Pets at 1111A Finch Ave W, Unit 2, North York, ON M3J 2P7 carries a curated selection of premium dog health supplements, including omega-3 and fish oil products from verified brands. The store is open 9 AM to 11 PM daily, 365 days a year. You can also order through delivery services including Uber Eats, DoorDash, SkipTheDishes, Instacart, and Fantuan. Call +1-647-564-4433 for product availability questions.

How long does it take to see results from herring oil supplementation in dogs?

Most pet owners report visible improvements in coat quality within four to eight weeks of consistent daily supplementation. Joint and mobility benefits may take longer to become apparent — typically eight to twelve weeks of regular use. Results vary based on your dog's individual health status, diet, age, and the quality of the product used. Consult your veterinarian if you do not see expected improvements or if your dog shows any adverse reactions.

Shop Dog Supplements at Ashario Pets in North York

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 every day of the year. As of 2026, we carry over 79 verified brands of dog food, cat food, treats, supplements, toys, and accessories — all available in-store or via home delivery. Whether you're building a complete omega-3 supplement routine or exploring new ways to support your dog's wellness, our knowledgeable team is here to help.

Explore our top pet product brands in Canada, read more on our dog blog, or visit us in store at 1111A Finch Ave W, Unit 2, North York. Have a question? Contact Ashario Pets or browse our pet store FAQ for more information.