Are Onions Toxic to Dogs?
Yes — onions are toxic to dogs.
PawSafe Check is for general information only and is not veterinary advice. Always contact your veterinarian or a poison control service if you think your pet has been exposed.
Symptoms to watch for
- Vomiting
- Diarrhea
- Weakness or low energy
- Pale gums
- Fast breathing or heart rate
- Red or brown urine (anemia can appear several days later)
Toxic parts
Raw, cooked, powdered and dehydrated onion
Toxic compound
Organosulfur compounds (N-propyl disulfide)
What to do now
- Call your vet or a pet poison control line immediately — don't wait for symptoms.
- Do not induce vomiting unless a vet tells you to.
- Bring the plant, label or packaging with you so the vet knows exactly what your dog ate.
- Note roughly how much was eaten and when.
Good to know
Onion damages red blood cells and can cause anemia. Onion powder in baby food, gravy and seasonings counts too. Cats are especially sensitive.
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Frequently asked questions
Can dogs eat onions?
No. Yes — onions are toxic to dogs.
Are onions toxic to dogs?
Yes — onions are toxic to dogs. Onion damages red blood cells and can cause anemia. Onion powder in baby food, gravy and seasonings counts too. Cats are especially sensitive.
What are the symptoms of onions poisoning in dogs?
Vomiting. Diarrhea. Weakness or low energy. Pale gums. Fast breathing or heart rate. Red or brown urine (anemia can appear several days later).
What should I do if my dog ate onions?
Call your vet or a pet poison control line immediately — don't wait for symptoms. Do not induce vomiting unless a vet tells you to. Bring the plant, label or packaging with you so the vet knows exactly what your dog ate. Note roughly how much was eaten and when.
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