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Why is my puppy in heat vomiting yellow liquid and not eating?

Updated on September 23rd, 2025

My 9 month old puppy just went into heat and she is puking yellowish liquid. She also will not eat. Is this normal?

4 Answers

Most Helpful Answer

Debi Matlack

Answered By Debi Matlack

Veterinary Technician

Published on January 5th, 2015

Vomiting is not usually a symptom of being in heat. It sounds as if she might have eaten something that either disagreed with her or something that has gotten stuck somewhere in her gastrointestinal tract. She could have been exposed to some sort of toxin or irritant in her environment or this could be early signs of another condition or disease process. She could also have a uterine infection causing these symptoms. I recommend getting her seen by your veterinarian as soon as possible. Your vet will do an exam, blood work and possibly x-rays to determine the cause of the illness and suggest an effective treatment plan. Additionally, unless she is a purebred that will improve the breed by producing offspring, I highly recommend getting her spayed once she is over her illness. This will eliminate the chance of her getting a life-threatening uterine infection and greatly reduce her chances of developing breast cancer in the future.
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Related Answers from Veterinarians

  • Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on March 30th, 2018

    Hi there! Sorry to hear that Phoebe is not feeling well. The clinical signs you describe are concerning when they occur in a puppy as they can be seen with serious gastrointestinal infections such as Parvovirus. Other possibilities include intestinal worms and dietary indiscretion, among other possibilities. The sooner these conditions are treated the better the outcome tends to be. For this reason, I recommend that you have Phoebe evaluated by your veterinarian to check for these possibilities and to start therapy based on findings. At the very least they can address dehydration if present and start her on anti-nausea medications. Good luck! Keeping my fingers crossed for your girl!

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    1Pet Parents found this answer helpful

  • Answered By Dr. Andrea

    Veterinarian

    Published on September 13th, 2019

    If your pup threw up just one time, I would keep an eye on her and see how she does. If she is lethargic, won't eat or has diarrhea, you need to see your vet. Yellow vomit is often bile and can be from an upset stomach, or from not eating for too long. Sometimes a small snack before bed- a handful of kibble or few biscuits- can help to prevent that from happening. Dogs can get a bit of acid reflux type of thing that a little food to work on helps prevent.

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    1Pet Parents found this answer helpful

  • Answered By Megan, DVM, CVA

    Veterinarian

    Published on April 17th, 2018

    Poor Girl! I would try to rest her tummy - no food and only small amounts of water for a few hours. I would then offer her a small amount of plain boiled boneless, skinless chicken breast and white rice to see if she can keep this down. If she continues to vomit or if she is refusing to eat, I would have your vet take a look at her. Your vet make want to do a fecal, blood work, and/or x-rays. I hope this helps and she starts to feel better really soon!

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    1Pet Parents found this answer helpful

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