My little trail dog has a new pack he is learning to wear. He loves it. Gets very excited when it comes out because he knows he is going hiking. Notices on yesterdays hike that he has a spot about the size of a nickle, where his short hair has been rubbed away and left a bald spot. No sign of redness (yet), but I fear that is next. Wondering if anyone else has had this sort of problem and how they dealt with it. I was thinking of sticking moleskin on the inside where the rub seems to be. Thoughts? Thanks in advance.