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Why is my dog losing fur in chunks, has bald spots, and is so itchy?

Updated On September 23rd, 2025

Pet's info: Dog | French Mastiff | Male | neutered

My poor French mastiff has chunks of fur just falling of him leaving many bald spots especially under his neck which look sore hot to touch and red spots this is a on going problem and have seen the vet on a number of occasions he is very itchy what can i do to ease the symptoms?

2 Answers

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on January 1st, 2018

This sounds like Bruce has a skin infection, or pyoderma. This usually needs antibiotics to resolve. However, in the meantime you can bathe him in an antimicrobial shampoo such as chlorhexidine or salicylic acid. These can be found in the human shampoo aisle in the dandruff area. Best of luck and thank you for using Pet Coach.

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    Answered By Kevin Sanada, DVM

    Veterinarian

    Published on November 23rd, 2017

    Infections by either fungi of bacteria tend to cause the most damage, but usually there is an underlying cause that allows the fungi and bacteria to flourish. It is also possible that these are caused by an autoimmune disease, or it's a reaction to allergies or fleas. In order to narrow down the cause of this, a veterinarian would need to examine Bruce and possibly take a sample for testing. For now, it will be good to wash the area with warm water and a medicated shampoo (can get this at the pet store) once a day. Use a cloth and gently wipe away any crusts. Do not scrub, because it will irritate the skin more. I hope that helps and Bruce gets better soon.

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