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My dog ate styrofoam. Is it dangerous? What symptoms to watch for?

Updated On September 23rd, 2025

Pet's info: Dog | Golden Retriever | Female | spayed | 1 year and 5 months old

My dog just ate some styrofoam. She is 65 lbs. I don't know exactly how much she ate, but I think she chewed it before eating it.

3 Answers

Most Helpful Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on January 28th, 2017

Poor girl. Styrofoam does have the potential to cause an obstruction, although smaller pieces have less of a tendency to do so. Monitor her for signs of an intestinal obstruction which includes excessive vomiting, lack of appetite, abdominal pain and weakness. Typically signs of an obstruction will occur within 24-48 hrs. If she seems fine beyond this then she's in the clear; however if you note these symptoms then take her to the vet immediately. In the meantime, feed her wet (canned) food to help bind it and then take her on 20-30 minute brisk walks twice a day to promote GI motility.

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Other Answers

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    Answered By Jacqueline Nobles, DVM, DACVECC

    Veterinarian, Board-Certified Emergency/Critical Care Specialist

    Published on

    She's large enough I would expect the styrofoam to pass especially if she chewed it. Ultimately, it depends on the size. You need to monitor her for vomiting and decreased appetite. If you observe these symptoms take her to the veterinarian for abdominal x-rays. If all goes well, she should pass it.

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    Answered By Jennifer Summerfield, DVM CPDT-KA

    Veterinarian, Certified Dog Trainer

    Published on January 5th, 2017

    Fortunately, styrofoam isn't considered toxic to dogs if they ingest it - but you're correct that it could possibly cause an obstruction if he swallowed a relatively large piece. As long as he's acting normal - eating and drinking, active, and having regular bowel movements - you shouldn't need to worry. Possible signs of an obstruction would include repeated episodes of vomiting, acting lethargic, not wanting to eat, or not having bowel movements. If you see any of these symptoms over the next few days, I would recommend taking him to the vet right away for an exam and x-rays.

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