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Should I worry about my dog's hair thinning between shoulder blades?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 3 years and 10 months old | 10 lbs

I adopted Shadow in February and got him set up with a vet. Everything was all good until a few days ago when I noticed a small spot of thinning hair between his shoulder blades. It’s gotten slightly larger, is this something to be concerned about? What are some possible things that could cause it? He has been treated with Bravecto, but not in the spot the hair is missing. I combed him all over with a flea comb to rule out fleas and didn’t find anything in his fur&the skin doesn’t seem irritated

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1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on July 10th, 2021

There are a few things that can cause this to happen: loss of hair where the microchip was placed (if he has one), reaction to a topical medication like (Bravecto, Frontline, Revolutions, etc), skin mites, topical allergic reaction, trauma.....just to name a few common things. To me this looks like a reaction to a topical product. The reaction does not always happen immediately and can take weeks or months to show up depending on what phase of growth the hair was in when it was damaged. I would not be overly worried but it would be best to have your vet check it out. Hope this helps. Best wishes.

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