Can cats eat green onion?

Q: Can cats eat green onion?

Same toxicity as onion — watch out for garnishes in soups and noodles. Green onions and leeks are Alliums too and damage red blood cells. A few garnish pieces is a small dose, but broth or repeated exposure adds up.

If your cat ate it

Signs: Lethargy, pale gums, red-brown urine
When: 1–5 days later
What to do now: Vet if a lot; if a little, watch for a few days and test blood if anything seems off.

Don't.

Why

Green onions and leeks are Alliums too and damage red blood cells. A few garnish pieces is a small dose, but broth or repeated exposure adds up.

If your cat has a condition

Dangerous for every cat, with or without a health condition.

Nutrition per 100 g

Nutrients per 100 g, with phosphorus also shown per 1000 kcal
Calories	23 kcal
Protein	1.78 g
Fat	0.15 g
Carbohydrate	4.8 g
Phosphorus	30 mg 1,304 mg/1000kcal
Sodium	0 mg
Potassium	181 mg

Source: Korea MFDS Food Nutrient Database — 파_대파_생것

SourcesReviewed 2026-10-24

Cope RB. Allium species poisoning in dogs and cats. Vet Med 2005;100:562-566
ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets
식품의약품안전처 식품영양성분 데이터베이스 (영양 숫자)

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