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Can cats eat raw fish?

Last updated 2026-05-08 · Sourced from ASPCA & Merck Veterinary Manual

No — avoid
Raw fish contains thiaminase, an enzyme that destroys vitamin B1. Causes neurological damage with regular consumption.

The short answer

No — avoid — cats should never eat raw fish. thiaminase risk Uncooked fish such as sushi or sashimi.

Remember: cats are obligate carnivores. They derive almost all their nutrition from animal protein, so even "safe" plant foods are treats — not staples.

Why it's dangerous

Raw fish contains thiaminase, an enzyme that destroys vitamin B1. Causes neurological damage with regular consumption.

Symptoms to watch for

Loss of appetite, weakness, seizures, neurological symptoms.

What every cat owner should know

  • No raw fish ever as regular food
  • Cooked fish only

What to do if your cat ate raw fish

  1. Stay calm. Note how much was eaten and when.
  2. Call your vet or ASPCA Animal Poison Control at 888-426-4435.
  3. Or Pet Poison Helpline: 855-764-7661.
  4. Do not induce vomiting in cats unless instructed by a vet — it's risky.
  5. Bring product packaging to the vet visit.
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Kitten safety

Raw Fish is even more dangerous for kittens than adult cats. Their smaller body weight means the same amount delivers a much higher toxic dose per pound. Their developing organs are also less able to process and clear toxins. If your kitten ate any amount of raw fish, contact your vet immediately — don't wait for symptoms.

What to do if your cat ate raw fish

  1. Don't wait for symptoms. Some toxic effects start hours later but treatment is most effective when given early.
  2. Call your vet or an animal poison control hotline now:
    • ASPCA Poison Control: (888) 426-4435 (fee may apply)
    • Pet Poison Helpline: (855) 764-7661
  3. Have these details ready: your pet's weight, the amount eaten, when it happened, and any symptoms you've noticed.
  4. Don't induce vomiting unless the vet specifically tells you to. Inducing vomiting at home can cause aspiration in some cases.
  5. Save the packaging or a sample of what was eaten — this helps the vet identify ingredients.
See full emergency guide

Safer alternatives to raw fish

Looking for a safe treat? Here are vet-approved alternatives cats can enjoy instead:

🍗
Chicken
Yes — perfect for cats
🥩
Beef
Yes — small amounts
🦃
Turkey
Yes — same
🥩
Lamb
Yes — same
🐟
Sardines
Yes — same

Frequently asked questions

Is raw fish toxic to cats?
Yes — Raw fish contains thiaminase, an enzyme that destroys vitamin B1. Causes neurological damage with regular consumption.
How much raw fish is too much?
Any amount can be dangerous. Even small ingestions warrant a call to your veterinarian.
Can kittens eat raw fish?
No — and even more dangerous than for adults due to lower body weight. Contact your vet immediately if a kitten eats any amount.
What are the symptoms of raw fish poisoning in cats?
Loss of appetite, weakness, seizures, neurological symptoms.
What should I do if my cat ate raw fish?
Call ASPCA Poison Control at (888) 426-4435 or your veterinarian immediately. Don't wait for symptoms.

Frequently asked questions

Can cats eat raw fish?
No — avoid. Raw fish contains thiaminase, an enzyme that destroys vitamin B1. Causes neurological damage with regular consumption.
What happens if a cat eats raw fish?
Loss of appetite, weakness, seizures, neurological symptoms.
Is raw fish toxic to cats?
Yes — raw fish is toxic to cats. Raw fish contains thiaminase, an enzyme that destroys vitamin B1. Causes neurological damage with regular consumption.
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