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My dog has a bleeding, growing anal mass, not eating, drinking a lot.

Updated On September 23rd, 2025

Pet's info: Dog | Mastiff | Female | unspayed | 110 lbs

My dog has a huge mass that is bleeding and pus filled in her anus. The mass has grown tremendously over the last week or so. Her appetite has also decreased and she’s drinking tons of water.

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1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on September 26th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. There is no way of knowing for sure without an examination though this represents a reason to seek veterinary care. This is usually determined with an examination and a fine needle aspirate (FNA) or a biopsy. Treatment depends on the findings up to that point. I recommend you have Soshi evaluated by a veterinarian for further assessment and treatment. Good luck and have a good night!

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