I was away to brush my mare and I rubbed my hand down the inside of her legs to make sure she didnt have any lumps and bumps etc and the hair literally just fell out in my hand. It happened on all 4 legs but back legs are the worst. She has never done anything like this before. She is brushed everyday. Do you think it just from her casting or could something else be causing it. Vet will be out this week for a vaccination anyway so will get him to check it out just wondered what it could be.