My husband set me up a temporary coop w/an 8x10 metal shed. We're cutting in windows, a pop door etc, and if we end up having to use it thru the winter we'll insulate it. (We can't build the real poultry/goat barn till our other house sells -- major bummer). But here's the problem: the metal shed has no floor and sits on a bed of gravel. It is anchored down, and I'm going to pile some of the jillions of huge rocks we have around here around the edges to discourage digging. I was planning to use the deep litter method. I thought the best thing under the circumstances might be to put down a big plastic dropcloth and pile on 6 inches of pine shavings to start with. Any suggestions or advice?