Currently it is on the ground, but I am seriously considering a raised wood floor. I realize with them going to the bathroom it will rot out eventuall even if I clean a bunch, but the value of them having somewhere dry to help avoid coccidiosis is really tempting me. My loafing sheds take on water when we get 6-12" in a day or so, and there is nowhere dry enough for my liking. The big shed stays dry enough, but they don't go out to the horse size loafing shed much. They prefer my six by six ones, but where they are, they get too much run off in the clay soil and are not dry enough. I am going to get another load of rock, and try to raise then above the surrounding ground to avoid it.