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Treat / Supplement

Fish oil (EPA/DHA): Calories, Dosing and Evidence

Fish oil (EPA/DHA) (supplement): ~25 kcal/ml, dosing — 50–100 mg epa per kg, evidence strong.

Updated Oct 22, 2026 · 189 words · Reviewed against the label & current research
Treat / Supplement
Spec sheet
KindSupplement
Calories~25 kcal/ml
Dosing50–100 mg EPA per kg
EvidenceStrong

The best-evidenced supplement in canine nutrition, and the easiest to overdose — excess fish oil adds real calories and can thin platelets. Dose by EPA content, not by capsule.

The numbers

Parameter Value
Kind Supplement
Calories ~25 kcal/ml
Dosing 50–100 mg EPA per kg
Evidence Strong

Every treat calorie comes out of the daily budget. A 25 kg dog on a 1,300 kcal maintenance plan has a 130 kcal treat ceiling — counting matters more than choosing.

How to use it

Dose rule for this one: 50–100 mg epa per kg. Weigh or count rather than estimating — the gap between measured and guessed treat intake is where most ‘he won’t lose weight’ cases live.

  • Subtract treat calories from kibble on heavy training days.
  • Check the label for xylitol — it is toxic in trace amounts.
  • Supplements: dose to the trial amounts in the research, not the bag’s marketing line.

What it will not do

No treat or supplement compensates for an over- or under-weight dog on the wrong base diet. Fix the bowl first; optimize the margins second.

Fish oil (EPA/DHA) is a margin item: useful, evidenced (strong) — and only within the dose rule.

Frequently asked questions

How many can my dog have per day?
Follow the dose rule u2014 50u2013100 mg epa per kg u2014 and keep the total under 10% of daily calories.
Are supplements regulated?
Loosely. Look for NASC membership and third-party testing statements; dose to trial amounts regardless of brand.
Can puppies have this?
Treats yes within the calorie budget; supplements only on veterinary advice.

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