Fish oil vs salmon oil for dogs: what the labels show

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

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Salmon oil is a fish oil, so there is no "versus" in chemistry. The real choices are which fish it comes from, how much EPA and DHA a serving contains, and whether the label tells you. On the labels we compared, every fish oil lists more EPA than DHA, and the amount per mL varies more than the fish name.

This page compares manufacturer label data from our catalog. It is not a trial of how dogs respond to each oil and it is not veterinary advice. For method see methodology.

What "fish oil" and "salmon oil" mean on a label

"Fish oil" is a category. A product may say "fish oil" and contain sardine and anchovy, pollock, menhaden or a mix. "Salmon oil" names one fish, and the oil may come from fish farmed in Norway or wild salmon from Alaska. A third group is blends, such as a salmon and pollock oil sold under a salmon name. For the salmon-labeled and salmon-blend products one by one, see salmon oil for dogs; for one pick per form, see best fish oil for dogs.

EPA and DHA by oil source

Here are liquids from the catalog grouped by source. Sorted by EPA+DHA per mL, the table puts all the oils on the same footing, whatever the measure each brand uses.

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

EPA to DHA balance, product by product

Every serving below is as the maker states it. The EPA figure is larger than the DHA figure in each oil.

The algae oil is the exception: it lists more DHA than EPA. Within the fish oils, the pollock oil has the largest lead of EPA over DHA in this table (540 mg against 275 mg), and the sardine-anchovy and salmon oils sit closer together. Serving sizes in this table are per teaspoon, but the per-mL numbers in the first table are the fair comparison. The Iceland Pure labels flag some values with an asterisk that the maker does not explain on the page, which is worth knowing before you rely on them.

What the table tells you

• The fish name does not predict potency. The three salmon-labeled oils in the first table run from 170 to 215 mg EPA+DHA per mL, and other salmon oils in our catalog list other values (see salmon oil for dogs). The pollock oil lists 165 mg, below each of those three, while the sardine-anchovy oils list 248 mg and the Icelandic fish blend lists 269 mg. Concentration follows the individual product, not the label's fish name.
• Blends are common. Several "salmon oil" products are salmon plus pollock or other fish. That is not a problem, but it is not single-source salmon either.
• Sourcing is a separate question. Farmed or wild, Norway or Alaska, single-species or blend: labels disclose these to different degrees, and the NASC Quality Seal is rarely stated on the maker pages we read. Neither a fish nor a salmon label proves more purity.
• Check the unit. One brand's "pump" or "teaspoon" is not another's. Convert to EPA+DHA per mL, as our tables do, or work in milligrams per day.

Which to choose

Pick by what you can verify: published EPA and DHA, a named source, and a unit you can measure. If your dog will not eat one oil or reacts to it, a different fish may help, and your veterinarian is the person to ask. Products whose makers publish only a total omega-3 figure, or none, cannot be compared fairly. See the Zesty Paws review for an example. For amounts, use the dosage calculator and ask your veterinarian before you start.

Related: omega-3 for dogs, krill oil for dogs, Grizzly oils. Page updated October 13, 2026 by the PetFishOilGuide editorial team.