Mine have the top of the door open. I have welded pipe grills that match the rest of the top half of the walls that can drop in to the pipe sides of the doors however, and I use those on the stud's stall and on Prez's stall. Since we seem to switch horses alot, I can move them. Well, Sonny pretty much stays where he is at but the others rotate out when mares are foaling.
You have pics?