Why not remove the horse to clean the stall? Because then the horse never gets trained how to be in the stall for cleaning. IMHO, not getting horses used to being stalled, what ya gonna do when you NEED to keep him in a stall? How many threads have there been where a horse has to be in and HATES the stall. Horses HATE whatever is NOT routine. Think about that last statement: We habituate them to routines, this is what training is ALL about. Skip whatever part of their training you like and you, or someone else, will eventually realize that that little piece of training might just be more important than you think it is. Freaking out in a stall is all about the horse behaving in the stall the same way he does when he is of his own devices. Habituate the horse to the stall and alllllllll that goes away. Taking the horse OUT of the stall to teach it how to be calm in a stall is like taking a horse out of a trailer to teach it how to be calm in a trailer. It don't work.