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Why is my dog lethargic, vomiting blood, and has a nipple lump?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 4 years and 6 months old | 9 lbs

My dog has a lump on her nipple this happened before but went away but now I'm worried since 3 days ago she poop blood with mucus and she vomited last night brown liquid now she's laying around all day she a shitzhu teacup 5 years old

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1 Answer

Most Helpful Answer

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Answered By Rebecca, DVM

Veterinarian

Published on June 19th, 2017

I would recommend that Linda see a vet. The lump may or may not be related to her other signs but vomitting and diarrhea with lethargy can become serious quickly in small breed dogs. Blood in her stool and brown vomitus indicates bleeding in her GI tract so she may be at risk of anemia as well as dehydration. She should be seen asap if she is still vomitting or lethargic and depressed. And mammary cancer is more likely to occur in unspayed females so the lump should be checked out as well. I hope Linda is feeling better soon.

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