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Why does my unspayed senior dog have a growing abdominal lump?

Updated On September 23rd, 2025

Pet's info: Dog | Staffordshire Bull Terrier | Female | unspayed

Hello, I have a 14 year old blue staff, who until we rescued her from her previous owner 6/7 years ago was neglected, misstreated, and heavily over bred. She has not been spayed as she has anxiety problems and we felt it would be too traumatic for her, and also she seems fine when she is in season. over 1 year ago we noticed a small pea sized, movable lump to the right of her abdomen which has grown to a current walnut size. We feed her plenty of mackrel daily and she has 4/5 15-20min walks aday

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on April 3rd, 2017

Since the mass is growing, a visit to your veterinarian is recommended. An older, intact female is at higher risk of mammary gland tumors than a spayed female. A fine needle aspirate can be performed in the clinic to collect a sample for pathology. This may determine if the lump is a benign mass, infection or a malignant tumor.

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