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My dog ate onion rings. Are they toxic? What should I do right now?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 11 months and 7 days old | 65 lbs

My dog ate 5 or 7 onion rings what do i do

3 Answers

Most Helpful Answer

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Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on May 13th, 2017

Onions can be toxic to dogs, for such a big dog this amount is not likely to be toxic but this cannot be ruled out completely. symptoms you need to be looking for: Lethargy. Weakness. Ataxia (lack of muscle coordination) Pale gums. Red or brown discolored urine. Hyper-salivation. Occasional vomiting and/or diarrhea.

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Other Answers

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    Answered By Makenzie Kurth, DVM

    Veterinarian

    Published on October 22nd, 2018

    Thanks for using Petco Pet Education Center, formerly Petcoach! If Kira is happy, active, and eating and drinking normally, it is very very unlikely that she is developing onion toxicity. Besides, one cooked onion ring for a dog this size is usually pretty safe. Continue monitoring for the next 24 hours and if you DO note any lethargy, loss of appetite, or other concerning signs, please have her seen right away. Best wishes to you and Kira!

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on October 28th, 2018

    Onion rings consist mostly of breading and fat and a relatively thin slice of onion. Hollie is a relatively big dog so 5 rings of onion will likely not cause onion toxicity in her. However the fatty breading may cause some diarrhea. Overall I do not think you have to worry. Should she get lethargic, pale, or tired within the next 5 or 6 days , she should be seen by a veterinarian for an exam, as onion toxicity tends to affect the red blood cells, destroys them, and so causes anemia.

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