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My 12lb dog ate onion strips and is throwing up. What now?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | neutered | 3 years and 6 months old | 11 lbs

My 12 lb dog ate 2-3 raw onion strips from a burger. He vomited everything in his stomach out a couple hours after, and about 12 hours later, after not feeding him to avoid upsetting his stomach, he vomited again but it was all bile. He otherwise seems to be fine behavior-wise, doesn't have diarrhea so far, or show any signs of red flags. Is there anything else I should do besides keeping an eye on him for the next couple days? What should I be in the lookout for? Thanks!

1 Answer

Most Helpful Answer

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on May 18th, 2019

Such a small amount of onion is unlikely to cause any toxic effect (linked to anemia and weakness after a few days) - it may be hamburger meat or other rich food which has triggered the vomiting. I would recommend giving oral rehydration fluids (pedialyte) and feeding small but frequent meals of a very low fat, bland diet such as boiled skinless chicken, brown rice and canned pumpkin (or canned specialist intestinal low fat diet). If symptoms persist a full vet check would be required

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