I think I read on this forum somewhere that sand is a good alternative for a coop floor cover. I'm really interested in this cover for fly control and cleaning ease. However, the coop that we have is a converted storage building with a plywood floor. My husband says that it should be more than strong enough to hold up the sand but is concerned that it will not be absorbant enough to trap water (spilled waterers or we have a couple of goats which like to climb in the coop and sometimes urinate) for removal and may cause the floor to rot. Any suggestions????