DearSitter / Can dogs eat / Onions

Can dogs eat onions?

Toxic

No. Onions damage a dog's red blood cells.

Raw, cooked, dried and powdered onion are all dangerous. Watch for soups, gravy, pizza and baby food that list onion powder.

Last reviewed September 2026. Based on the veterinary sources listed below. Every dog is different, so call your vet if you're unsure.

My dog ate onions. What do I do?

  1. Call your vet, especially if your dog ate more than a bite or eats onion often.
  2. Tell them your dog's weight, how much they ate and roughly when.
  3. Don't make your dog throw up unless a vet tells you to.

Signs to watch for: Weakness, pale gums, fast breathing, reddish urine and low energy, often a few days later.

Poison help lines (US, 24/7)
ASPCA Animal Poison Control
A consultation fee may apply
(888) 426-4435
Pet Poison Helpline
A consultation fee may apply
(855) 764-7661

Why?

Onions contain compounds that break down red blood cells and can cause anemia. The damage can build up over a few days, so a dog may look fine at first.

Sources