We have an awesome stallion. But we decided to lease a stallion to get new lines, Holy Molly!! He is as sweet as the come. But he is young and has not bred much. When we put him in with the mare he was trying to kill her. He freaked. He broke my husbands thumb and frac his wrist. What should I do. All my mare have foals by thier side. What is the best way to do this?? Or should I ust return him and cut my loss????