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My 50lb dog ate 7 onion rings. Will she be okay or is it toxic?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 5 years and 1 month old | 50 lbs

My dog got into my onion rings she is part coonhound part Australian shepherd and weights about 50 pounds. She ate about 7 or so onion rings and there are no vets opened or taking new clients in the town I live in cause of covid 19

3 Answers

Most Helpful Answer

Answered By Tomasz Wnuk

Veterinarian

Published on July 18th, 2020

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. Onion in toxic to dogs but it does not sound that Dakota has eaten large enough amount of onions to develop intoxication. The toxic dose of onion is about 15-20g/kg of bodyweight, so it means that Dakota would have to eat about 300-400 grams of onion (which is a whole large onion) to get into trouble. Please, keep an eye on her at home, she may develop mild signs of gastroenteritis (one vomit, mild diarrhea etc) but there should not be any other worrying symptoms.

26Pet Parents found this answer helpful

Related Answers from Veterinarians

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on May 18th, 2018
Consumption of as little as 15-30gm/kg of onion has resulted changes in the blood of dogs who eat it. Onion toxicities are noted in animals that ingest more than 0.5% of their body weight. That would be like a 20 pound dog eating 1/4th of a cup of onions. For Abigail, she would have to ingest around 1/8th of a cup in order to see toxic signs. Given that a 1cm piece of onion isn't enough to make 1/8th of a cup, she should be fine. Just make sure she doesn't get any more! Best of luck, I hope this helps!
12Pet Parents found this answer helpful
Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on March 7th, 2017
Oh no, that wasn't good that Akamaru ate onions! It can take as little as 15 to 30 g/kg to cause toxicity in her. I'm not sure how much she weighs, but if it was a small quantity and she's is likely a large dog being a GSD, a small quantity won't do any damages. I would have her seen by a vet in the morning to be safe, however, but you can always take her into a clinic now to be sure she is ok.
1Pet Parents found this answer helpful

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Thank you for reaching out to Petco Pet Education Center, formerly Petcoach with your question about GG. The toxic amount of onion in dogs is 100 grams (about the size of a medium onion) per 20kg of a dog's weight to cause toxic effects, which means that a 45 pound dog would have to eat a medium to large onion to experience dangerous toxicity levels. Luckily in this case, two onion rings will not contain that much onion. There is a concern about the fattiness of the onion rings, as they are fried, and fried and fatty foods can cause pancreatitis in dogs. I would monitor her for vomiting, diarrhea, abdominal pain, a hunched up appearance, vomiting undigested food, and lethargy. If you see any of those signs, have her seen by a vet immediately. Hopefully, however, she will be just fine, and I don't think in this case, you need to do anything. Don't induce vomiting, and there's no need to take her into a vet unless you see any of the signs I just mentioned. I hope this helps!

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