No, but they do need something to protect them from the weather elements
stall
Daily you should always clean your horses stall at least once a day
That depends on the 2 horses in the stall together. Some horses are inseperable and love to together others such as to stallions should never be put in the same stall, although some horses pair up the best Idea if you have the chance is to put the 2 horses in 2 different stalls.
stall
it is called a stall
Stall.
Horses are owned all over the United States. EVERYWHERE really!
stables/stall
stall
If the horse is in the stall frequently, then clean it frequently. Every day!
about every week
However long you want it to be.