Can dogs eat scallion / green onion?
Last reviewed June 2026 · Sourced from ASPCA & Merck Veterinary Manual
The short answer
No — avoid — dogs should never eat scallion / green onion. allium Long thin onion.
Why it's dangerous
Allium toxicity.
What to do if your dog ate scallion / green onion
Stay calm, note how much was eaten, and contact your vet immediately. For urgent help, the ASPCA Animal Poison Control hotline is 888-426-4435. See our full step-by-step guide: Dog ate something toxic — what to do.
allium
Puppy safety
Scallion / Green Onion is even more dangerous for puppies than adult dogs. Their smaller body weight means the same amount delivers a much higher toxic dose per pound. Their developing organs are also less able to process and clear toxins. If your puppy ate any amount of scallion / green onion, contact your vet immediately — don't wait for symptoms.
What to do if your dog ate scallion / green onion
- Don't wait for symptoms. Some toxic effects start hours later but treatment is most effective when given early.
- Call your vet or an animal poison control hotline now:
- ASPCA Poison Control: (888) 426-4435 (fee may apply)
- Pet Poison Helpline: (855) 764-7661
- Have these details ready: your pet's weight, the amount eaten, when it happened, and any symptoms you've noticed.
- Don't induce vomiting unless the vet specifically tells you to. Inducing vomiting at home can cause aspiration in some cases.
- Save the packaging or a sample of what was eaten — this helps the vet identify ingredients.
Safer alternatives to scallion / green onion
Looking for a safe treat? Here are vet-approved alternatives dogs can enjoy instead: