i put on in my chicken hutch the other day upright.. so they jump into it from the top... my leghorn laid in it for 3 or 4 days..when she didn't want to leave the run area becasue it was windy and cold... today she was back to the nest cage on ym front porch..
i tried it on it's side, and they just had too much fun kicking hte hay out of it.. and my neighbor keeps his upright so i decided ot give it a try...