How Much Fish Oil Can I Give My Dog in Canada 2026? Omega-3 Dosage by Weight and Supplements to Buy

Fish oil is one of the most common supplement questions we get at our North York store. Owners want to help with itchy skin, dull coats, and stiff joints — and omega-3s can genuinely help. But dosing matters, and too much fish oil isn't harmless. This guide covers safe daily amounts by weight, what to look for on a label, and which dog health and wellness products we carry. Always confirm dosing with your vet before starting a new supplement.

Key Takeaway: A common starting dose is roughly 75–100 mg of combined EPA + DHA per kilogram of body weight per day for healthy dogs. Higher therapeutic doses are sometimes used for skin, joint, or kidney conditions — but only under veterinary guidance. You can shop omega-3 options in our dog products collection.

How much fish oil can I give my dog in Canada 2026?

For most healthy adult dogs, a general maintenance dose is about 75–100 mg of combined EPA and DHA (the two active omega-3 fatty acids) per kilogram of body weight daily. A 20 kg (44 lb) dog would need roughly 1,500–2,000 mg of EPA+DHA per day. Always dose by EPA+DHA content, not by total fish oil volume, and check with your veterinarian first.

This distinction trips up a lot of people. A "1000 mg fish oil" capsule doesn't contain 1000 mg of omega-3 — it usually contains around 300 mg of combined EPA and DHA, with the rest being other fats. That's why reading the guaranteed analysis on the label is essential. Our team at Ashario Pets always turns the bottle over with customers to find the EPA and DHA numbers before recommending a serving.

Higher "therapeutic" doses — sometimes reaching 200–300 mg/kg of EPA+DHA — are used for specific issues like inflammatory skin disease, osteoarthritis, or chronic kidney disease. Those doses should never be self-prescribed. According to the American Veterinary Medical Association, supplement dosing should be tailored to the individual dog's condition and monitored over time.

What's the dog fish oil dosage by weight?

Dog fish oil dosage scales with body weight, using combined EPA+DHA rather than total oil. As a maintenance guideline of roughly 75–100 mg EPA+DHA per kg, here's what typical Canadian dogs need daily. These are starting points only — confirm the exact amount with your vet, especially for puppies, seniors, or dogs on medication.

• Small dog — 5 kg (11 lb): approximately 375–500 mg EPA+DHA per day
• Medium dog — 10 kg (22 lb): approximately 750–1,000 mg EPA+DHA per day
• Medium-large dog — 20 kg (44 lb): approximately 1,500–2,000 mg EPA+DHA per day
• Large dog — 30 kg (66 lb): approximately 2,250–3,000 mg EPA+DHA per day
• Giant breed — 45 kg (99 lb): approximately 3,375–4,500 mg EPA+DHA per day

Start low and build up over a week or two. In our store we see customers whose dogs get loose stools when they jump straight to a full dose — easing in gives the digestive system time to adjust. If your dog already eats a food rich in omega-3, like some raw dog food formulas or fish-based kibble, factor that in so you don't overdo it. The Dog Supplements in North York guide walks through how supplements fit alongside a complete diet.

What are the omega 3 benefits for dogs?

Omega-3 fatty acids — specifically EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) — support skin barrier function, coat shine, joint comfort, cognitive health, and a balanced inflammatory response. They work by shifting the ratio of omega-6 to omega-3 fatty acids in the body toward a less inflammatory state.

Most commercial dog foods are naturally higher in omega-6 than omega-3, which is where supplementation helps rebalance things. Marine sources (fish oil, krill oil, green-lipped mussel) provide EPA and DHA directly, while plant sources like flaxseed provide ALA, which dogs convert to EPA and DHA very inefficiently. That's why fish oil is generally preferred over flax for dogs.

Common reasons Toronto owners reach for omega-3s include dry, flaky skin in our harsh winters, seasonal allergy flare-ups, and joint stiffness in aging large breeds. The American Kennel Club notes that omega-3 supplementation is among the most-studied nutritional interventions for canine skin and joint health. Research summaries on NCBI/PubMed also document EPA and DHA's role in managing canine osteoarthritis. As of 2026, fish oil remains one of the most evidence-backed supplements you can add to a dog's routine — but it complements, never replaces, veterinary care.

What is the best fish oil for dogs and which omega 3 supplements do we carry?

The best fish oil for a dog is one with a clearly stated EPA+DHA content, sourced from wild-caught or sustainably farmed fish, stored to protect against rancidity, and free of unnecessary fillers. At Ashario Pets we carry omega-3 and skin-and-coat supplements from brands like Wellytails and MOJO Pet Supplements, plus omega-rich whole foods.

Here's how two popular Canadian options compare for the reader deciding between a targeted supplement and an omega-rich food approach:

Customers love Wellytails because it's a Canadian brand and the omega dosing is straightforward to add to a bowl. For owners already committed to raw feeding, building omega-3 in through the diet is a natural fit. Our nutrition experts at the North York store often suggest starting with a dedicated supplement if a dog has a specific skin or joint concern, since it lets you control the EPA+DHA dose precisely. Browse the full brand lineup or the wider dog products range to compare.

How do I give fish oil safely and store it properly?

Fish oil is safe for most dogs when dosed correctly, given with food, and stored to prevent oxidation. Introduce it gradually over 7–14 days, keep liquid oils refrigerated after opening, and discard any product that smells strongly rancid. Watch for loose stools, which usually signal the dose is too high.

A few practical points our team shares with customers on Finch Ave:

• Give with a meal. Omega-3s are fat-soluble and absorb better alongside food.
• Store cold. Heat and light degrade fish oil fast. Refrigerate liquids; keep capsules and powders in a cool, dark cupboard.
• Watch the calories. Fish oil adds roughly 40 kcal per 5 mL (one teaspoon). For small dogs, that can matter — trim regular food slightly if needed.
• Mind the bleeding risk. Very high omega-3 doses can affect blood clotting, so tell your vet before surgery.
• Check vitamin E. High omega-3 intake can slightly increase vitamin E needs; balanced supplements often account for this.

The FDA Center for Veterinary Medicine recommends choosing supplements with transparent labelling and lot-level quality control. If your dog is on any medication, has a bleeding disorder, or is pregnant, get veterinary clearance first — this is general education, not medical advice.

Fish oil pairs well with a solid grooming routine for skin-and-coat results, too. A quality omega-3 works from the inside while regular brushing and bathing from our dog grooming range supports the coat from the outside.

The bottom line on dosing fish oil for your dog

Bottom Line: Dose fish oil by combined EPA+DHA content, not total oil volume, at roughly 75–100 mg/kg daily for maintenance, and confirm the amount with your vet. Choose a clearly labelled product, introduce it slowly, store it cold, and give it with food. Ashario Pets stocks Canadian omega options like Wellytails and MOJO Pet Supplements, plus omega-rich foods, at our North York store.

Ashario Pets is a premium pet supply store located at 1111A Finch Ave W, Unit 2, North York, Ontario, open 7 AM to 11 PM daily, 365 days a year. We carry 79+ brands of dog and cat food, treats, supplements, toys, and accessories. Our North York store on Finch Ave gets a lot of omega-3 questions from customers in the Yonge-Finch area, especially through the dry winter months — feel free to bring your current food label in and we'll help you calculate the right top-up dose.

Frequently Asked Questions

Can I give my dog human fish oil capsules?

Human fish oil can be given to dogs if you dose it precisely by EPA+DHA content and the product has no added flavourings, sweeteners, or xylitol. The challenge is dosing accuracy — human capsules are sized for people, so a small dog may only need a fraction of one. Dog-specific supplements from brands like Wellytails simplify this by giving canine serving guidance. Confirm with your veterinarian before switching.

How long until fish oil improves my dog's coat?

Most owners see coat and skin improvements within 4 to 8 weeks of consistent daily fish oil at the correct dose. Joint-comfort benefits can take a similar 8-week window to appear. Consistency matters more than dose size — skipping days undercuts results. If you see no change after two months, revisit the EPA+DHA dose and the underlying cause with your vet.

Can too much fish oil hurt my dog?

Yes. Excessive fish oil can cause diarrhea, weight gain from extra calories, altered blood clotting, and increased vitamin E requirements. The most common sign of overdosing we hear about is loose stools. Stick to the EPA+DHA-per-kilogram guideline, introduce it gradually, and never jump to therapeutic doses without veterinary supervision.

Is fish oil or a fish-based food better for omega-3?

Both work. A dedicated fish oil supplement lets you control the exact EPA+DHA dose, which is ideal for a specific skin or joint concern. A fish-based diet — like certain raw or fish-inclusive kibble formulas — builds omega-3 into every meal for maintenance. Many dogs do well on a fish-forward diet plus a supplement top-up during allergy or winter dry-skin season.

Where can I buy omega-3 supplements for dogs near North York?

Ashario Pets at 1111A Finch Ave W, Unit 2, North York, stocks omega-3 and skin-and-coat supplements from Canadian brands like Wellytails and MOJO Pet Supplements, open 7 AM to 11 PM daily. You can shop in person, arrange free in-store pickup, or order GTA delivery through Uber Eats, DoorDash, and SkipTheDishes. Reach us at +1-647-564-4433 with dosing questions.