Wender PetsOverview
All forms of onion are toxic and can destroy red blood cells.
Onions contain N-propyl disulfide, which causes oxidative damage to red blood cells, leading to hemolytic anemia. All parts of the onion — flesh, leaves, juice, powders — are toxic. This includes cooked, raw, dried, and powdered forms. Onion powder is especially dangerous due to concentration.
Symptoms to Watch For
Lethargy, weakness, decreased appetite, pale gums, fainting, reddish urine, vomiting, elevated heart rate.
Emergency Information
Contact your vet immediately if your dog ingests onion in any form.
ASPCA Poison Control: (888) 426-4435
Frequently Asked Questions
Can dogs eat onions?
No, onions is toxic to dogs and should never be fed to them. All forms of onion are toxic and can destroy red blood cells.
Is onions toxic to dogs?
Yes, onions is considered toxic for dogs. Onions contain N-propyl disulfide, which causes oxidative damage to red blood cells, leading to hemolytic anemia. All parts of the onion — flesh, leaves, juice, powders — are toxic. This includes cooked, raw, dried, and powdered forms. Onion powder is especially dangerous due to concentration.
What happens if my dog eats onions?
If your dog eats onions, watch for: Lethargy, weakness, decreased appetite, pale gums, fainting, reddish urine, vomiting, elevated heart rate. Contact your vet immediately if you notice these symptoms.
How much onions can I give my dog?
No amount of onions is safe for dogs. Keep it away from your pet entirely.