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Can Dogs Eat Onion?
Verdict
Toxic — do not feed
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.
Onion for dogs at a glance
| Verdict | Toxic — do not feed |
|---|---|
| How much | None — don't feed it. |
| If your dog eats it | Call your vet now (UK: Animal PoisonLine, 01202 509000). Don't wait for symptoms. |
Always consult your vet. If your dog has eaten something you're worried about — or shows any unusual symptoms — call your veterinarian immediately. In the UK, pet owners can also call Animal PoisonLine (run by the Veterinary Poisons Information Service) on 01202 509000, a 24-hour paid triage service. This page is editorial guidance, not emergency advice for an individual animal.
Frequently asked questions
Related foods
See also
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