When a horse is moved to a new herd the herd dynamics always changes a little and the pecking order is up for grab all over again. I do not like to move any horses if I don't need to because there is always going to be a couple days of reestablishing the herd and with that comes the possibility of a few bumps and bruises.
As a barn owner I know there are going to be times when a horse needs to be moved and at my barn I always make it a priority to let the owner of the horse know ahead of time why I am moving their horse and when. I want to make sure that they understand that I have the best interest of their horse at hand along with the entire herd.
I personally believe it is bad business and practice to move a horse without the owner having prior knowledge of the move. The owner of the horse might not like the decision but they will know that the barn owner respects them enough to talk with them about it ahead of time.
If you are looking for a place to board your horse, then this is a question that I would always asks the barn owner or manager. Find out how they run their operation and talk to other boarders at the barn also.
Horses do need to be moved once in a while but the owner of the horse should always be the first to know, not the last!
Thank you for the great question,