I have had this horse for 2 months and when he came to us he was a little lame from not working for 2 years and suddenly working everyday. He got over that but still has a head bob going to the left at the trot. The vet has checked him and said he is sound but he still has this bob. How can that be fixed? Anyone ever heard of this? It doesn't bother me, I just don't want my daughter going in the show ring and people thinking he is lame when he isn't.