Verdict
Never feed
Key concern
Allium compounds
Species
🐱 Cats
Why this verdict for cats
Leeks are highly toxic to cats, which are very sensitive to allium vegetables. Never feed them.
Warning signs to watch for
- Weakness
- Pale gums
⚠ If your cat ate leek
Act immediately — don't wait for symptoms.
- Call your vet or a pet poison helpline right away.
- Note how much was eaten and when.
- Do not induce vomiting unless a professional tells you to.
🛡️
Poisoning emergencies are expensive
A single toxicity visit can cost hundreds. Compare pet insurance plans that cover accidents and poisoning.
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Frequently asked questions
Can cats eat leek?
No. Leeks are highly toxic to cats, which are very sensitive to allium vegetables. Never feed them.
How much leek can cats have?
None — leek is not safe for cats and should be avoided entirely. When in doubt, ask your vet.
Is leek safe for dogs too?
Verdicts can differ between species. See the dog answer for leek →
Related foods
By the CanMyPet Editorial Team · Reviewed against ASPCA Animal Poison Control, the American Kennel Club (AKC) and Pet Poison Helpline · Last updated June 2026.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- American Kennel Club — Dog Nutrition
- Pet Poison Helpline — Poison List
CanMyPet provides general information reviewed against trusted sources (ASPCA, AKC, Pet Poison Helpline). It is not a substitute for professional veterinary advice. When in doubt, always contact your veterinarian.