Leek
Verdict
Never — allium family, highly toxic to cats.
If your cat ate this
Cats hide symptoms — don't wait and see. Even small amounts of certain substances can be fatal to a cat. Act fast.
- 1. Call your veterinarian immediately
- 2. ASPCA Animal Poison Control: (888) 426-4435
- 3. Pet Poison Helpline: (855) 764-7661 (consultation fee applies)
A consultation fee may apply for poison control hotlines.
Verdict
Leeks are allium vegetables that contain thiosulfates and organosulfur compounds highly harmful to cats' red blood cells. The entire plant is toxic, including the bulb and green leaves. Cats are particularly vulnerable to allium toxicity due to their limited G6PD enzyme levels. Leeks are frequently used in cooking, so be aware of soups, stews, and casseroles that may contain them.
Symptoms to watch for
- • vomiting
- • diarrhea
- • lethargy
- • pale gums
- • weakness
What to do
Contact your vet. Check all human food before sharing — soups, stews, and stock often contain leeks or onion. When in doubt, don't feed it.
📞 US ASPCA Animal Poison Control: (888) 426-4435
Related foods
Onion
DangerousNever — extremely toxic to cats. Far more dangerous than for dogs.
VegetablesGarlic
DangerousNever — 5× more concentrated than onion. Extremely toxic to cats.
VegetablesChives
DangerousNever — allium family, toxic to cats.
VegetablesRhubarb
ToxicNever — oxalic acid damages the kidneys.
Vegetables