05/28/2026
Onions are toxic to dogs in every form — raw, cooked, dried, and powdered. Because they turn up in so many everyday meals, they're now the #5 most-reported pet poison in North America.
If your dog has eaten onion and seems fine, that's not the all-clear. The worst signs of poisoning can take a day or two to show up, so it's worth calling your vet right away rather than waiting to see.
Our vet-written guide covers how to keep onions out of reach, how much it takes to cause harm, which dogs are at elevated risk, the early and late signs to watch for, and what to do if your dog eats onion.
Learn more: https://campfiretreats.com/blogs/campfire-tales/can-dogs-eat-onions