tuna

FishCaution for cats

Tuna is a named protein cats love — best as an ingredient, not a diet. What the engine rewards, and where the caution sits.

Also appears on labels as: fresh tuna · deboned tuna · flaked tuna · skipjack tuna · yellowfin tuna

What it is

Tuna is a large predatory fish contributing named animal protein. Labels say tuna, fresh tuna, or flaked tuna, most often in wet cat formulas. As a big predator it accumulates more mercury than small forage fish like sardines or herring.

Why it's in pet food

Palatability, mostly — tuna is famously irresistible to cats, and it carries genuine protein and some omega-3s. The honest caveat is dose: tuna as one ingredient of a balanced formula is a different thing from tuna as the diet.

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.

Tuna is on the engine's named-protein list: 15 points on the ingredient-quality pillar when fresh tuna leads the label (a named tuna meal earns 12 there instead). The cat-specific caution below is informational context on this page — it does not change the score.

For cats

The caution is about tuna as a staple, not tuna in a recipe: unbalanced all-tuna feeding has been associated with vitamin E deficiency (steatitis) in cats, and large predatory fish carry more mercury than small forage fish. In a complete, balanced formula tuna is fine; if tuna is most of what your cat eats, that is a vet conversation.

Read the full methodology

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.

Can cats eat tuna every day?

Tuna as one ingredient of a complete, balanced formula is fine. Tuna as the diet is the problem: unbalanced all-tuna feeding has been associated with vitamin E deficiency (steatitis) in cats, and tuna carries more mercury than small forage fish. If tuna is most of what your cat eats, that is a vet conversation.

Does tuna contain mercury?

Tuna is a large predatory fish, and it accumulates more mercury than small forage fish like sardines or herring. In a balanced formula the dose is a different thing from an all-tuna diet — the caution is about tuna as a staple, not tuna in a recipe.

How does Bowlmark score tuna in cat food?

Tuna is on the engine's named-protein list: 15 points on the ingredient-quality pillar when fresh tuna leads the label, or 12 for a named tuna meal. The cat-specific staple caution is informational context on this page — it does not change the score.

Foods that list tuna

Ranked by score where scores exist. Placement here is never sold.

Sources

Further reading

Cite this page

Bowlmark. "Tuna in pet food — what it is and how it scores." https://www.bowlmark.com/ingredient/tuna

Engine
Methodology engine v1.1.0 · config 13c99e2f
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Last verified August 21, 2026

No stored score to stamp yet — the engine and config above are the ones a scan runs today.

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