Plant safety record
Onion
Allium cepa
Prevent cats and dogs from accessing correctly identified Allium cepa. Contact a veterinarian or animal poison-control service promptly after suspected exposure.
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Cats
TOXIC
ASPCA classifies Onion, Allium cepa, as toxic to cats.
Dogs
TOXIC
ASPCA classifies Onion, Allium cepa, as toxic to dogs.
Quick answer
ASPCA classifies Allium cepa as toxic to cats and dogs, and Kew accepts that species identity.
Plant identity and scope
This record is limited to Allium cepa, the accepted species identified by Kew and ASPCA. It remains separate from Garlic, Chives, and other Allium species even where their safety classifications are similar.
Governed aliases: Bulb Onion.
What the evidence supports
The toxic result is tied to Onion identified as Allium cepa. This species record does not substitute a genus-wide conclusion for exact plant identification.
Safety classifications come from PawPlants' governed evidence record, not from a retailer or product label.
If exposure may have occurred
Prevent further access, retain a label or clear photo, and contact a veterinarian or animal poison-control service promptly for case-specific advice. Do not induce vomiting unless a veterinary professional directs it.
Open PawPlants emergency guidance for immediate next steps and contact options.
Evidence and sources
- ASPCA Animal Poison Control — OnionCat: Toxic; Dog: Toxic; subject: Allium cepa.
- Royal Botanic Gardens, Kew — Plants of the World Online — Allium cepaEvidence subject: Allium cepa.