🧅
Can Dogs Eat Onion?
Verdict
Toxic — do not feed
All forms — raw, cooked, powdered — are toxic.
Why it is toxic
Onions contain thiosulphates that destroy red blood cells, causing haemolytic anaemia. Cooking does not destroy the toxin.
Symptoms to watch for
Lethargy, pale gums, vomiting, dark urine — call your vet immediately.
Always consult your vet. If your dog has eaten something you're worried about — or shows any unusual symptoms — call your veterinarian or a pet poison helpline immediately. This page is editorial guidance, not emergency advice for an individual animal.