Originally Posted by SorrelHorse
I, personally, would stop every now and then and let the horse get out and stretch. Maybe somewhere safe to lunge just in case. Be sure they have food and water, all wrapped up in shipping boots and stuff.
If it's a new horse, I would not let the horse out of the trailer. Too many bad if's and unknowns for that. Stop every couple of hours for a half hour or so, offer water at each stop, and have a couple of horse hotels on file in case you need to stop at a point.