fish oil
Fish oil delivers real omega-3s from unnamed fish — good molecule, anonymous source. How Bowlmark scores it, exactly.
Also appears on labels as: fish oil (preserved with mixed tocopherols) · refined fish oil · fish oils
What it is
Fish oil is oil rendered from unspecified fish, added for EPA and DHA — the long-chain omega-3s tied to skin, coat, joint, and cognitive support. The molecule is genuinely valuable; "fish" tells you nothing about which species delivered it or how consistent the supply is.
Why it's in pet food
Omega-3s are among the best-supported supplemental ingredients in pet nutrition, and generic fish oil is the cheapest way to add them. The deduction below is not a verdict on omega-3s — it prices the anonymity, not the fatty acids.
How Bowlmark scores it
Scores are deterministic math over the printed label — the rules below apply to every product identically, and nothing estimates or fills in a blank.
"Fish oil" is one of the engine's flagged unnamed-fish terms: a 10-point deduction on the ingredient-quality pillar, applied once for the fish class and separate from the 20-point unnamed mammal/poultry deduction. Named marine oils go the other way — salmon oil and krill oil are on the whole-foods bonus list (+2 each in the top twelve, class capped at 8).
Common questions
Answers come from this entry and the scoring rules above — reviewed before publish, like everything else on this page. For anything about your own pet, your vet knows best.
Is fish oil good for dogs and cats?
The molecule is genuinely valuable: fish oil is added for EPA and DHA — the long-chain omega-3s tied to skin, coat, joint, and cognitive support — and omega-3s are among the best-supported supplemental ingredients in pet nutrition. What "fish oil" doesn't tell you is which species delivered it or how consistent the supply is.
Why does Bowlmark deduct points for fish oil?
The deduction prices the anonymity, not the fatty acids: "fish oil" is one of the engine's flagged unnamed-fish terms — a 10-point deduction on the ingredient-quality pillar, applied once for the fish class and separate from the 20-point unnamed mammal/poultry deduction. It is not a verdict on omega-3s.
Is salmon oil better than fish oil on a label?
On the label-reading axis, yes: named marine oils go the other way in the engine — salmon oil and krill oil are on the whole-foods bonus list (+2 each in the top twelve, class capped at 8), while generic "fish oil" takes the unnamed-fish deduction. The named oil tells you which species delivered the omega-3s; the generic term tells you nothing.
Foods that list fish oil
Ranked by score where scores exist. Placement here is never sold.
- Hill's Science Diet Adult Perfect Weight & Joint Support Chicken & Brown Rice Recipe90
- ACANA Singles Beef & Pumpkin Recipe89
- ACANA Light & Fit Recipe88
- Grayledge Senior 8+ Chicken & Barley Recipe88
- Silverbirch Feline Science Senior Vitality 11+ Chicken & Rice88
- ACANA Classics, Salmon and Barley Recipe87
- ACANA First Feast Kitten87
- ACANA Free-Run Poultry Recipe87
Compare foods that list fish oil
Same species, same form, both scored — closest scores first, so the comparison is a real one.
Sources
Related ingredients
Further reading
Cite this page
Bowlmark. "Fish oil in pet food — what it is and how it scores." https://www.bowlmark.com/ingredient/fish-oil
- Engine
- Methodology engine v1.1.0 · config 13c99e2f
- Verified
- Last verified August 22, 2026
No stored score to stamp yet — the engine and config above are the ones a scan runs today.