FoodToxic
Onion
Also known as: fried onion, onion soup, shallots, onion powder
How dangerous is it?
DogSevere
CatSevere
See a vet today
Call us on +853 6677 6611 for advice within the hour. Have the amount eaten and your pet's weight ready.
Signs to watch for
- Weakness and pale gums days later
- Vomiting or diarrhoea
- Dark or red-tinged urine
What to do
Call us the same day with an estimate of how much was eaten. Damage to red blood cells appears one to five days later, so early treatment matters.
Macau note
Onion is the base of many local dishes, from minchi to congee toppings. Cooked onion is just as toxic as raw.
This guide is for general information only and does not replace a veterinary examination. When in doubt, always call the clinic.
Reviewed by the Royal Veterinary Center veterinary team.