Senior Dog Fit

Omega-3 Dosage for Dogs

The published EPA+DHA (combined) dosage range for dogs is 50-220 mg per kg of body weight per day, with 100 mg/kg/day as a practical floor for a noticeable effect. There's a separate, higher safety ceiling above which side effects (GI upset, delayed clotting) become more likely. Enter your dog's weight below.

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The published dose range doesn't split into separate numbers for these two purposes — both fall inside the same 50-220 mg/kg/day range. This selection only changes the note below, not the numbers.

Where these numbers come from

The 50-220 mg/kg/day range and 100 mg/kg/day practical floor are from Roush et al. 2010, JAVMA, and Fritsch et al. 2010, JVIM. The safety ceiling (370 mg/kg0.75/day) is fromPMC9499673, checked 2026-08-15. This is total combined EPA+DHA, not total fish oil weight — see the fish oil capsule calculatorto convert this into a capsule count. Dogs on blood thinners, with clotting disorders, or scheduled for surgery should have omega-3 use cleared by a vet first.

Related tools

A fish oil with EPA and DHA labeled

Look for a product that lists EPA and DHA amounts separately, not just a combined "fish oil" or "omega-3" number, so you can match it to the dose above.

Fish oil for dogs (EPA+DHA labeled) on Amazon