My dog ate Onions
✗ Highly Toxic
📊 Risk Calculator
Enter details above for a risk assessment
If in doubt, always call your vet or the Animal Poison Line immediately.
Why It's Dangerous
Onions contain N-propyl disulphide which damages red blood cells, leading to haemolytic anaemia. All forms are dangerous : cooked onions, onion powder, and onion-containing sauces are just as toxic as raw. Toxicity is cumulative, meaning small amounts over time can cause serious harm.
Symptoms to Watch For
- Weakness and lethargy
- Pale or yellowish gums
- Loss of appetite
- Breathlessness
- Red or orange-tinged urine
Vet Guidance
Contact your vet. Effects can develop days after eating. If you know your dog ate onions recently, call your vet even without symptoms.
Emergency Contacts
Animal Poison Line (UK)
01202 509000
RSPCA Emergency
0300 1234 999