Best fish oil supplements for dogs: picks by form, from label data

By the PetFishOilGuide editorial team · Updated October 13, 2026 · How we compare

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The best fish oil supplements for dogs are the ones that give your dog the right EPA and DHA in a form it will take. We pick by form, using label data only: highest EPA+DHA per mL for liquids, highest per softgel, and highest per chew among the chews with published numbers. We have not lab-tested any product.

Searching for the best fish oil for dogs usually ends with a list of the same few bottles and no explanation. Here we show the label numbers behind each pick, so you can judge for yourself. Dog size changes which product fits, and a ranking cannot know it. The full tables with every product are on the main fish oil comparison; this page only explains the pick for each form.

How we choose the best fish oil for dogs

We start with products labeled for dogs whose makers publish EPA and DHA. We then pick the leader in each form by one label number: EPA+DHA per mL for liquids, EPA+DHA per softgel for softgels. A pick is a label number and nothing more. It is not a verdict on quality, safety or results.

What this method cannot tell you:

• Freshness and purity. Labels say nothing about oxidation, contaminants or batch testing. We did not test any product.
• Whether your dog will take it. Taste and smell vary.
• The right amount. Dose depends on weight, food, and health. Your vet decides.
• Seals. Most makers do not state a NASC Quality Seal where we looked, so we do not use it to pick.

Affiliate links do not affect the picks. See our method.

The picks at a glance

One row per pick, liquids first. Each name links to the card below with the maker's source and the date we checked it.

Label data from manufacturer websites and published label text, checked October 13, 2026. How we compare.

Best liquid fish oil for dogs by EPA+DHA per mL

Liquids can be measured to a dog's weight, and the per-mL figure is comparable across brands. These are the liquids we would look at first, highest per mL first.

Most concentrated: Iceland Pure Premier Omega Oil for Large Dog Breeds (17 fl oz)

This oil lists the highest EPA+DHA per mL among dog liquids in our catalog, at 530 mg, and the label gives 2,614.2 mg per teaspoon. That makes it a fit for large dogs that would otherwise need a lot of a weaker oil, and a poor fit for small dogs, because one teaspoon is a large amount of EPA and DHA. The maker prints these as maximum values, so the real amount may be lower. It is labeled for large breeds, so follow the label and ask your vet.

Left out of the ranking: Pet Wellbeing Omega-3 Icelandic Fish Oil for Dogs (8 fl oz pump)

This Icelandic fish oil is a popular pump bottle, but we do not rank it. The maker's dog and cat listings of the same oil give different serving sizes, and we could not confirm the correct EPA and DHA per serving, so we show no number rather than guess. If you are considering it, read the supplement facts on the bottle.

Strong liquid, smaller bottle: Nutramax Welactin Advanced 3TA Omega-3 Liquid (8 fl oz)

At 440 mg per mL, this is a concentrated liquid, below the Iceland Pure oil above but well above most dog liquids in our catalog (see the table). The label lists 880 mg per 2 mL serving. Our catalog records the omega-3 here as ethyl ester, a form that is common in concentrated oils. The container holds 118.3 servings.

A salmon oil option: Iceland Pure Salmon Oil Pharmaceutical Grade & Unscented (17 fl oz)

If you specifically want salmon oil, this one lists 215 mg EPA+DHA per mL and 102 servings per bottle. It is labeled for dogs and cats. Many products sold as salmon oil are blends, which is why we compare them on our salmon oil page.

Dog-labeled liquid: Nordic Naturals Omega-3 Pet (liquid, dogs)

This liquid is labeled for dogs and gives 621 mg per 2.5 mL serving, or 248 mg per mL. That is a lower concentration than the oils above, which means a larger volume for the same EPA and DHA. See our Nordic Naturals review.

Best fish oil softgels for dogs by EPA+DHA per softgel

Softgels are easy to count and carry. The trade-off is that one softgel holds a fixed, fairly small amount.

Tied for the most per softgel: Nutri-Vet Fish Oil Softgels for Dogs

The label gives 300 mg EPA+DHA per softgel. In our catalog five dog softgels list this same figure: this one, the Strawfield below, NOW Pets Omega-3 Support Softgels for Dogs & Cats, NOW Pets Omega-3 Mini Gels for Dogs & Cats and SeaPet Omega PURE Fish Oil Capsules (100 ct). The maker lists this one as a fish blend. We have no container count for it in our data, so check the package.

Same strength, large count: Strawfield Pets 1000 mg Omega 3 Softgels (250 ct)

It matches that figure at 300 mg per softgel and ships 250 softgels per container, the largest count of any dog softgel in the catalog. Because the strengths tie, the count is what separates these products: for a dog that needs several softgels a day, it matters as much as the strength. The maker calls it a "1000 mg" softgel, which shows why the front-of-bottle number is not the EPA+DHA figure.

Best fish oil chews for dogs

Few chew makers publish EPA and DHA at all. Among the dog chews in our catalog that do, the numbers per chew differ by a factor of several, so the chew you pick matters.

Highest per chew: Stratford Animal Health (Swedencare) Omega 3 Soft Chews (large and giant dogs)

The label lists 540 mg EPA and 360 mg DHA, or 900 mg EPA+DHA, per 1 chew. That is the most per chew among dog chews in our catalog. As we recorded the label, dosing goes by weight: one chew every other day for 7 to 13 kg, one a day for 14 to 27 kg, two a day for 28 to 40 kg, and three a day over 40 kg. We did not record a count per container, so check the package. Our figures come from a search extract of the maker's page and match a distributor label, not from a direct fetch. This is the large-dog version; check the label for your dog's size and ask your vet.

Other chews with published numbers

The same maker's small-dog-and-cat chew, Stratford Animal Health (Swedencare) Omega 3 Soft Chews (small dogs and cats), lists 450 mg EPA+DHA per chew, which suits smaller dogs better. Bernie's OMG Omegas Soft Chews lists 265 mg per chew, and the label has a small conflict between its EPA, DHA and total figures, so treat that number with care. Nutramax Welactin Canine Soft Chews (60 ct) lists 255 mg per chew. It is one of the few with a published count, 60 chews per container, which helps if you want to know how long a pack lasts. More in liquid vs softgel vs chews.

How to choose for your dog

1. Ask your vet whether fish oil makes sense for your dog and what amount to aim for.
2. Use the dosage calculator with a product's EPA+DHA to see how many servings fall in the suggested supplemental range.
3. Pick the form that your dog will take and you will give every day.
4. Read about side effects and watch your dog after starting.

Page updated October 13, 2026. Picks are based on manufacturer label data checked on the dates shown on each card. We did not test any product, and this page has not been checked by a veterinarian.