Can cats eat leeks?
Last reviewed June 2026 · Sourced from ASPCA & Merck Veterinary Manual
The short answer
No — avoid — cats should never eat leeks. NO Mild allium related to onions and garlic.
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
Same.
Symptoms to watch for
Same — even more sensitive than dogs.
What to do if your cat ate leeks
Stay calm, note how much was eaten, and contact your vet immediately. For urgent help, the ASPCA Animal Poison Control hotline is 888-426-4435. See our full step-by-step guide: Cat ate something toxic — what to do.
NO
Kitten safety
Leeks 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 leeks, contact your vet immediately — don't wait for symptoms.
What to do if your cat ate leeks
- Don't wait for symptoms. Some toxic effects start hours later but treatment is most effective when given early.
- 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
- Have these details ready: your pet's weight, the amount eaten, when it happened, and any symptoms you've noticed.
- Don't induce vomiting unless the vet specifically tells you to. Inducing vomiting at home can cause aspiration in some cases.
- Save the packaging or a sample of what was eaten — this helps the vet identify ingredients.
Safer alternatives to leeks
Looking for a safe treat? Here are vet-approved alternatives cats can enjoy instead: