Call ASPCA Poison Control: 888-426-4435 or your vet immediately.
Onion is not safe for Golden Retrievers and should never be offered. Onions are toxic to Golden Retrievers and all dogs. There is no safe serving size — even tiny amounts can cause serious harm.
Destroys red blood cells causing anemia. If your Golden Retriever has accidentally eaten Onion, do not wait for symptoms. Contact your vet or ASPCA Poison Control (888-426-4435) immediately — early treatment dramatically improves outcomes.
| Thiosulfate | ❌ Toxic to all pets |
| All forms | Raw, cooked, powder |
| Safe amount? | Zero |
| Action | Vet immediately |
Vet-recommended, best-selling on Amazon