onion

Onions contain n-propyl disulfide, which damages red blood cells in cats and dogs causing hemolytic anemia. Toxic in all forms: raw, cooked, powder, or extract.

Other common names: onion powder, onion extract, dehydrated onion, dried onion, 洋蔥, 洋蔥粉, 洋葱, 洋葱粉, 玉ねぎ, タマネギ

Sources: ASPCA Animal Poison Control Center, FDA Center for Veterinary Medicine, veterinary literature. For reference only, not medical advice. If poisoning is suspected, seek veterinary care immediately.