Is Cats Safe?
Is Onion Safe for Cats?
No — Onion is toxic to cats.
Onion is listed as toxic to cats by ASPCA Animal Poison Control. The toxic component is N-propyl disulfide. Cats metabolise many plant and chemical compounds poorly, so keep Onion away from your cat and treat any exposure seriously.
| Scientific name | Allium cepa |
|---|---|
| Family | Liliaceae |
| Category | Plants |
Signs to watch for in cats
Vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, panting
If your cat may have been exposed to Onion:
- Don't wait for symptoms; don't induce vomiting unless a professional tells you to.
- Note what and how much, and take any packaging with you.
- Call your vet or a 24/7 line now — Pet Poison Helpline 855-764-7661 · ASPCA 888-426-4435.
Cat-safe alternatives
Browse all Plants for cats · or check another item.
Source: ASPCA Animal Poison Control ↗
Frequently asked questions
Is Onion toxic to cats?
Yes. Onion is reported toxic to cats by ASPCA Animal Poison Control. Keep it away from your cat.
What are the symptoms if a cat is exposed to Onion?
Reported signs include: Vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, panting
What should I do if my cat ate Onion?
Contact your vet or a 24/7 animal poison line right away: Pet Poison Helpline (855-764-7661) or ASPCA Animal Poison Control (888-426-4435).