Welactin for dogs: what the label says about EPA and DHA

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

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Welactin is Nutramax's fish oil line for dogs, sold as softgels, soft chews and two liquids. The label amounts range from 255 mg EPA+DHA in a softgel to 1,330 mg in one 6 mL scoop of liquid. The maker does not name the fish species or list a NASC seal on the pages we checked.

This is an independent read of the manufacturer's label data. It is not a test of the product and it is not veterinary advice. Numbers come from Nutramax's own product pages, checked on the date shown in each card below. Our method is on the methodology page.

The Welactin line at a glance

Four products are in our catalog. Sorted by EPA+DHA in one serving, they compare like this. Remember that a serving is a different thing in each row: a softgel, a chew or a scoop.

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

Softgels and soft chews: the same amounts

Nutramax Welactin Canine Softgels (120 ct) lists 155 mg EPA and 100 mg DHA per softgel, 255 mg combined. The soft chew lists the same 255 mg per chew, plus ETA (eicosatetraenoic acid) and beta-glucan, which are not omega-3s you can add to an EPA+DHA total. The label direction for both is the same style: 1 softgel daily per 20 lb body weight.

Because the amount per piece is modest, larger dogs need several pieces a day to reach the range we describe below, and a container empties faster than its count suggests. Chews are also a food-like treat, so the extra calories and any ingredients you avoid matter. Our liquid vs softgel vs chews page covers that trade-off.

The liquids: where the numbers get larger

The standard liquid scoop is 6 mL, with 1,330 mg of combined EPA+DHA. That works out to 222 mg per mL. Nutramax publishes only the combined figure for this product, with no separate EPA and DHA line, so we cannot tell you the ratio between them.

Nutramax Welactin Advanced 3TA Omega-3 Liquid (8 fl oz) is a more concentrated liquid. Its serving is 2 mL and lists 530 mg EPA and 350 mg DHA, which is 440 mg per mL. The label marks these values as ethyl ester, a form made by processing the natural triglyceride oil. Nutramax gives two scoop counts by weight for this product, labeled "broad spectrum" and "joint health". Those are the maker's labels, not our claims, and the second count is roughly double the first. Ask your veterinarian whether either applies to your dog. We will not pick a number for you.

How it compares with other liquids

Per mL, the standard Welactin liquid (222 mg) sits close to Iceland Pure Salmon Oil Pharmaceutical Grade & Unscented (17 fl oz) (215 mg) and below Nordic Naturals Omega-3 Pet (liquid, dogs) (248 mg) and Deley Naturals Icelandic Wild-Caught Omega 3 Fish Oil for Dogs (16 fl oz pump) (269 mg). Advanced 3TA, at 440 mg per mL, is well above all of them in this group, so you give less volume for the same EPA+DHA. More per mL is not automatically better: it only means a smaller measure. See the full ranked list on best fish oil for dogs.

What the Welactin label does and does not tell you

• EPA and DHA amounts: disclosed for every product we list, though the standard liquid gives only the combined figure.
• Fish species and source: not named on the Welactin pages we read. Compare that with brands that list sardines, anchovies or pollock.
• Molecular form: stated only for Advanced 3TA (ethyl ester). Not stated for the others.
• NASC Quality Seal: not shown on the pages we checked, so our tables show a dash rather than "Yes" or "No". Check the bottle itself.
• Third-party testing: not stated on the pages we checked.
• Servings per container: listed or calculable for each pack; see the cards.

Who Welactin fits, and who should look elsewhere

It may suit you if you want a well-known brand with a label that spells out EPA+DHA per piece, and you prefer softgels, chews or a measured scoop to a pump. It fits households that want one product in several forms, for instance chews for a picky dog and liquid for a large one.

Look elsewhere if you want the fish species named, a visible NASC seal, or a pump-bottle oil. Welactin Canine is labeled for dogs. For cats, see fish oil for cats. Dogs who are already on a diet or medication affected by omega-3, or who have pancreatitis or a bleeding disorder, need a veterinarian's input before any fish oil, a topic we cover on fish oil side effects in dogs.

How to dose it using the label

Do not rely on "one softgel per 20 lb" alone. Work from the EPA+DHA on the label. A board-certified veterinary nutritionist has published 50 to 75 mg of combined EPA+DHA per kg of body weight per day as a supplemental range for adult dogs, and the National Research Council set a safe upper limit of about 370 mg times body weight in kg to the 0.75 power per day, counting what the food already supplies. Our dosage calculator turns your dog's weight and a product's label numbers into whole softgels or chews, or a liquid volume. Ask your veterinarian before you start, especially for senior dogs or dogs with health conditions.

The product cards

Each card repeats the label data we recorded and links to the Nutramax page it came from.

Questions about Welactin

Related: Nordic Naturals Omega-3 Pet review, omega-3 for dogs. Page updated October 13, 2026 by the PetFishOilGuide editorial team.