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Why is my dog in heat vomiting brown phlegm after running?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | unspayed | 15 lbs

my year old beagle collie mix is in heat yesterday she started dri heaving and vomiting blood it slowed down to but now its more like a brown flem and its seems to be happening more often she seem really thirsty and still energetic but every time she exercise's and runs it flares up she dry heavs and eventually starts vomiting

1 Answer

Most Helpful Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on January 7th, 2017

It sounds like your pet may have a bleeding disorder. I would definitely recommend getting her checked by your vet and get a coagulation test done. She may require special medication to make sure she doesn't become extremely ill. At the very least she should get anti-vomit medication from your vet.

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