We've got the footings done for the new coop. I looked at all the wonderful coop designs here and picked one I liked. My question is, can you have a dirt floor for the run? It seems most of what I have seen is sand or wood shavings.... Is it okay to just leave it dirt? The coop will be raised from the ground 2 feet, and I'm still trying to decide if I should have sand in there or wood shavings...I've read most of the posts about the pros and cons of those, just haven't made a decision yet.