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My dog ate garlic and onion, now vomiting. Should I go to the vet?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 3 years and 3 months old | 12 lbs

Hi my mother in law gave my dog a small amount of fish that contained garlic and onion last night. Today my dog has been sick with some vomiting. Do I need to take her to the vet?

1 Answer

Most Helpful Answer

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Answered By Anna M., DVM

Veterinarian

Published on October 2nd, 2017

Hello, and thank you for using Petco Pet Education Center, formerly Petcoach. While onion and garlic are toxic to dogs, their toxicity is dose-dependent so a small amount of fish flavored with a little onion and garlic would most likely not contain enough to be toxic, unless the dish was really loaded with onions/garlic. Onions and garlic cause destruction of red blood cells and anemia, which would cause a dog to be lethargic with pale gums. If Sady is sick and vomiting today, I suspect it's more likely GI upset from getting something different from her normal diet, rather than being directly related to the onions & garlic. She would feel better fastest if you took her to the vet and got something to calm her GI tract down, but if she's otherwise acting pretty normal you could try offering her small amounts of bland food today such as boiled lowfat chicken breast and white rice, and if she's still vomiting tomorrow then have her seen by your vet. If her vomiting is accompanied by lack of appetite or lethargy, then I would have her seen right away. Hope this helps and Sady feels better soon!

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