Can dogs eat… › Onion
Can dogs eat onion?
⛔ No — onion is toxic to dogs. Never feed it.
Onions (raw, cooked or powdered) damage red blood cells and can cause anaemia. All forms, including onion powder in seasonings, are toxic.
If eaten: Watch for weakness, pale gums or dark urine and call your vet.
Built on AAFCO & FDA pet-food criteria · Last updated June 2026 · How we rate
Why onion is dangerous
Onions (raw, cooked or powdered) damage red blood cells and can cause anaemia. All forms, including onion powder in seasonings, are toxic.
Symptoms to watch for
Signs can include vomiting, diarrhoea, lethargy, tremors, a racing heart, or weakness. Symptoms may be delayed, so don't wait for them to appear.
What to do if your dog ate onion
Watch for weakness, pale gums or dark urine and call your vet. Have the amount, your dog's weight and the time of ingestion ready. You can also call the ASPCA Animal Poison Control Center. Do not induce vomiting unless a professional tells you to.
What about their everyday food?
Treats are only part of the picture — your dog's main diet matters most. Paste your dog food's ingredients into the WoofScore checker to see how it grades A–F.