Onions
DangerAll members of the allium family (onions, garlic, shallots, chives, leeks) are toxic. They damage red blood cells and can cause anemia.
Quick Answer: Is Onions Toxic to Dogs or Cats?
Use this short answer first, then read symptoms and what to do next.
Is Onions toxic to dogs?
Yes. Treat Onions as an emergency risk for dogs. Call your veterinarian or a pet poison hotline right away after exposure.
Is Onions toxic to cats?
Yes. Treat Onions as an emergency risk for cats. Call your veterinarian or a pet poison hotline right away after exposure.
Symptoms to watch for
Lethargy, weakness, pale gums, red urine, vomiting, breathlessness
What should I do now?
Contact your vet immediately. Severe cases may require blood transfusion.
Dogs
Emergency risk
Cats
Emergency risk
Risk level
Danger
Symptoms
Lethargy, weakness, pale gums, red urine, vomiting, breathlessness
What to do now
Contact your vet immediately. Severe cases may require blood transfusion.
Explore Related Safety Hubs
Use these hub pages for broader dog, cat, cleaner, and emergency planning guidance.
Dog Toxicity Guide
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Open hubCat poisoningCat Toxicity Guide
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Open hubEmergency planningVet Cost Hub
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Open hubMore Detailed Guides
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Symptoms to Watch For
Lethargy, weakness, pale gums, red urine, vomiting, breathlessness
What to Do
Contact your vet immediately. Severe cases may require blood transfusion.
Plan ahead for emergency vet bills
Poisoning, broken bones, and emergency surgery can get expensive quickly. Compare costs and accident coverage before you need it.
Pet Poisoning Emergency Checklist
A one-page checklist for symptoms, product labels, emergency contacts, and what to bring to the clinic.
Clinical References
Quick Answers
Is Onions poisonous to dogs?
Is Onions toxic to cats?
What symptoms can Onions cause in pets?
What should I do if my pet ate Onions?
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