ToxiPetsToxiPets
Pet Food Ingredients
Vet Reviewed

Can cats eat onion?

Quick Answer

Yes, onion is toxic to cats. If your cat has ingested onion, contact your veterinarian or pet poison control immediately.

For Dogs

TOXIC

For Cats

TOXIC
ONION

Your pet ate ONION?

Get a personalized risk assessment for ONION based on your pet's weight — free in the app.

About ONION

Allium cepa (Onion) by Boiron is an over-the-counter homeopathic medication formulated for human use and administered in oral pellet form. This preparation primarily aims to address the symptoms associated with minor ailments such as colds, allergies, or hay fever. It is known in homeopathy to potentially relieve symptoms like a runny nose, sneezing, and watery eyes. When considering its use around pets, it's important to note that onions are toxic to both cats and dogs. Onion toxicity in pets can lead to serious health issues. If ingested by cats or dogs, onion can cause oxidative damage to red blood cells, leading to hemolytic anemia. Symptoms of onion toxicity in pets may include vomiting, diarrhea, lethargy, weakness, decreased appetite, and pale or reddish urine. While the dosage in homeopathic preparations for humans is generally diluted, it’s crucial to keep such medications out of reach of pets to avoid the risk of toxicity. If you suspect that your pet has ingested onion in any form, it is essential to contact a veterinarian immediately.

Be honest — you won't remember this article at 2am when your pet eats something.

Skip the Googling next time. Scan ONION (or anything else) in ToxiPets and get an instant answer personalized to your pet's weight and breed.

Emergency Pet Poison Hotlines

ASPCA Poison Control

(888) 426-4435

*Consultation fee may apply

Pet Poison Helpline

(855) 764-7661

*Consultation fee may apply

Related Information

Other Pet Food Ingredients to Watch Out For

Dr. Kamala Freeman

Dr. Kamala Freeman

DVMEmergency Veterinarian

Dr. Kamala Freeman is an emergency veterinarian with extensive experience in urgent pet care and toxicity cases. She works at an emergency veterinary hospital treating pets exposed to poisons, toxins, and other life-threatening emergencies.

Stop Googling. Start scanning.

Next time your pet gets into something, skip the articles. Open ToxiPets, scan it, and get a personalized answer in seconds — based on your pet's weight, breed, and health.

Free to download • Used by 50,000+ pet parents