My horse has white saddle scars near his withers from more then a year ago and I have not used that saddle for a year. Have a new saddle now but have not used that either for a while now. However, I went out to see him tonight and on one of the white marks the hair looked thinner so I started fiddling with it and little clumps of hair kept falling out! It's about the size of a quarter and bare to the skin...no scabs or open wound or anything... His blanket does not sit there, so it's not that. He has girth itch on his girth area right now, and I know it can spread anywhere but this hairless area is not bumpy so I don't think it's that... I'm not sure what it is or if I should be concerned! Anyone got anything to say???