Limited

Can cats eat fish?

Cats can have a small amount of plain cooked, boneless fish occasionally as a treat or topper. Cats are obligate carnivores, but fish alone is not a complete diet unless it is a formulated cat food. Watch bones, mercury, and tuna frequency—and never use raw fish as a staple.

Not medical advice — general pet-safety info only. Confirm with your vet before changing your cat’s diet.

Updated Aug 24, 2026 Category Nutrition

Alternatives to fish for cats

Kitchen fish leftovers are easy to overdo. These fishy cat treats are portioned for cats.

Fish cat treats

Purpose-made fish treats portion the flavor without kitchen bones.

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Freeze-dried salmon cat treats

Freeze-dried salmon is a cleaner fishy reward than leftover fillets.

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Salmon cat treats

Salmon treats keep the fish lane controlled and cat-formulated.

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How much is okay?

Use a small amount of fully cooked, boneless plain fish and keep it occasional—not an everyday bowl.

Kitten / small adult
½ teaspoon flaked
Keep it tiny and occasional.
Typical adult
1 teaspoon flaked
Plain preparation only.
Large / big appetite
1–2 teaspoons flaked
Still an extra, not a meal.

Rule of thumb: treats of all kinds should stay under ~10% of daily calories.

How to prepare them

  • Cook fully and check every bite for bones.
  • Serve plain—skip breading, batter, salt, smoke, and sauces.
  • Prefer variety over daily tuna; formulated fish cat food is different from kitchen leftovers.

Risks & exceptions

  • Fish bones can choke or injure the digestive tract.
  • Some species carry higher mercury; frequent tuna is a poor habit.
  • Raw fish can carry parasites and thiaminase concerns and should not be a casual staple.

Only share plain cooked, boneless fish as an occasional treat or topper—not a complete homemade diet.

If they ate too many

If they ate more than intended, watch for stomach upset and changes in behavior.

  • Soft stool
  • Mild vomiting
  • Thirst after salty fish

Call your vet / pet poison line if:

  • Bone swallowed or choking
  • Repeated vomiting
  • A large raw or seasoned serving

FAQ

Can cats eat fish bones?

No. Bones can choke, splinter, or injure the gut.

Can cats eat raw fish?

Do not use raw fish as a casual treat or staple—see our raw fish page and ask your vet.

Can cats eat tuna every day?

No. Plain tuna as an occasional treat is safer than making it a daily default.

Affiliate disclosure: we may earn a commission from product links. Safety guidance is editorial and may change — verify with your veterinarian for your cat.