Vegetables
Onion
Not Safe
Onions can be toxic to dogs and should not be intentionally fed.
- Potentially Toxic
Safe part
None for intentional feeding.
Avoid
Onion in all forms, including raw, cooked, dehydrated and powdered onion.
Preparation
Do not intentionally feed onion or foods containing meaningful amounts of onion.
Serving guidance
No intentional serving.
Did your dog already eat some?
A meaningful onion exposure can cause illness even if the dog initially appears normal. Contact a veterinarian or pet poison service for guidance after a concerning ingestion.
Why we say this
Onions are members of the Allium family and can damage red blood cells, potentially causing hemolytic anemia. Raw, cooked, dehydrated and powdered forms can all be problematic.
Sources
- Merck Veterinary Manual — Garlic and Onion (Allium spp.) Toxicosis in Animals
- ASPCA Animal Poison Control
Confidence: High · Last reviewed 2026-09-01