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My dog has pus, skin growths, and hair loss. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | American Bully | Female | unspayed | 90 lbs

I want to know whats wrong with my dog I've been going to the vets for 2 years and all theyve given me is steroids and antibiotic. She has pus filled infections skin growths and now lose of hair she also doesnt want to put weight on back right foot. The puss started after the growth on her chin started.

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1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on July 11th, 2019

Thanks for using Petco Pet Education Center, formerly Petcoach! This is possibly due to allergies. It really comes down to figuring out what is causing her allergies so that they can be treated or the specific allergen avoided. A secondary infection is likely and also needs to be addressed. At this point, I would recommend that you visit a veterinary dermatologist. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!

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