Are Green onions Toxic to Cats?
Yes — green onions are toxic to cats.
PawSafe Check is for general information only and is not veterinary advice. Always contact your veterinarian or a poison control service if you think your pet has been exposed.
Symptoms to watch for
- Vomiting
- Diarrhea
- Weakness and lethargy
- Pale gums
- Fast breathing or heart rate
- Red or brown urine (days later)
Toxic parts
All parts, raw or cooked
Toxic compound
N-propyl disulfide and other sulfur compounds
What to do now
- Call your vet or a pet poison control line immediately — don't wait for symptoms.
- Do not induce vomiting unless a vet tells you to.
- Bring the plant, label or packaging with you so the vet knows exactly what your cat ate.
- Note roughly how much was eaten and when.
Good to know
Green onions are in the same family as onions and garlic and can damage red blood cells. Cats are especially sensitive.
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Frequently asked questions
Can cats eat green onions?
No. Yes — green onions are toxic to cats.
Are green onions toxic to cats?
Yes — green onions are toxic to cats. Green onions are in the same family as onions and garlic and can damage red blood cells. Cats are especially sensitive.
What are the symptoms of green onions poisoning in cats?
Vomiting. Diarrhea. Weakness and lethargy. Pale gums. Fast breathing or heart rate. Red or brown urine (days later).
What should I do if my cat ate green onions?
Call your vet or a pet poison control line immediately — don't wait for symptoms. Do not induce vomiting unless a vet tells you to. Bring the plant, label or packaging with you so the vet knows exactly what your cat ate. Note roughly how much was eaten and when.
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