Can Dogs Eat Onions?
Why it’s a problem
Onions contain N-propyl disulfide, a compound that destroys red blood cells and causes hemolytic anemia. Onion powder is the most concentrated form and shows up in soups, gravy, baby food and seasoning mixes. Leeks, chives and shallots belong to the same family and are equally unsafe.
How to serve it safely
Keep all alliums (onions, garlic, leeks, chives) off your dog’s plate, and check ingredient labels on leftovers and broths for onion powder.
Warning signs to watch for
Lethargy, weakness, pale or bluish gums, red or brown urine, rapid breathing and collapse. Anemia can appear days after eating onions.
When to call the vet
Call your vet as soon as you know onions were eaten — early treatment prevents the worst outcomes.
Common questions
What if the onion was cooked in a big stew?
Cooking does not destroy the toxin, and broth soaks it up. Stews and gravies are among the most common onion-poisoning sources.
More foods for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away.