During spring, summer and fall (unless there's a tornado brewing) all of mine that are not show horses stay out 24/7. The show horses get stalled in the daytime to keep them in coat and out at night. In winter, if we're going to have really ugly weather then they all get stalled, sometimes for 2 or 3 days at a time. As soon as it's not actively icing, snowing or hailing though, they go right back out on 'pasture' with big round bales of hay to eat on. I really hate keeping horses cooped up and prefer them to go out on pasture where they can graze, run, roll and socialize. They all come in 2X/day for their grain buckets and grooming and if they're to get ridden. Otherwise I like to leave them out to be horses.