We have a large shed that we use as the goats "house". The shed has no floor and when we put the shed back there YEARS ago as a storage shed, we threw down a tarp to set it on so what was in there did not sit right in the dirt. Well, we have since cleaned it out but the tarp is still there. We had been putting hay down so they were laying right on the tarp. is that ok? how often should we change the hay out, daily? OR can we just leave the ground bare (we are working on pulling up the tarp so the goats do not eat it, so far they have left it alone) and find something like a cot that they can lay on so they aren't sleeping on a hard ground? Also, what do you do with all your old hay?