My horse is a performance horse, and his tail needs to be braided regularly for competitions. But it makes it difficult to braid when he rubs the top of his tail so badly! He rubs his behind on the wall of his stall when no one is around, and I always find him with a tail that has been rubbed into a frizzy, matted mess. I tried washing his tail and using anti-itch shampoo, but he just keeps on rubbing it every single day! I also tried giving him those lick-treats that you hang in their stall, but he still that doesn't stop him. Pleas help! Thanks in advance!