The breakage is mostly on her back and sides. None on her head. I am so puzzled about this. It's not to the skin, it just breaks off about an inch from the skin. It's long on her legs, head and ears. It can't be the harness, she only wears it outside on walks. We have a fenced in yard so they only have on their collars most of the time. And it's only her with the problem. The other 2 are fine.