Food & Drinks•Last updated: 12/26/2025
Is Onions Toxic for Dogs?
Yes, onions is toxic to dogs and can cause serious harm. Learn the symptoms, what to do, and how to keep your pet safe.
Moderate Toxicity
Immediate Action Required
Seek immediate veterinary attention
This is a medical emergency. Contact your vet or emergency clinic right away.
Dangerous Amount: Toxicity is cumulative - small amounts over time can be dangerous
May take several days to appear
Common Symptoms
- Vomiting
- Diarrhea
- Weakness
- Pale gums
- Elevated heart rate
- Collapse
- Anemia signs
What To Do
- 1Contact your veterinarian
- 2Even cooked onions are toxic
- 3Note how much was consumed
- 4Monitor for signs of anemia
Common Sources
Watch out for these products that may contain onions:
Raw onionsCooked onionsOnion powderFried onionsOnion ringsFoods containing onion
Related Items to Avoid
Emergency Contacts
If your dog has ingested something toxic, contact your veterinarian or emergency clinic immediately.
ASPCA Animal Poison Control:(888) 426-4435
Consultation fee may apply
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