Is she itching/rubbing it? It’s an odd place to lose fur randomly for sure. Could just be lighting but is she also losing a little around her eye?
that white or grey post injury hair regrowth seems to be common across several short haired single colored breeds, like Doberman, Weimeraner, Vizsla etc. In fact in order to avoid any eyebrow raised in the show ring about the AKC vizsla standard: White due to aging or scarring must not be faultedI had the hair come back white, after a injury on the dogs. Shine, and it looks like Heifer might be the same will get a white hair at a injection site. No idea why, and haven’t been concerned about it.