My coop is a two story coop. The top story is half enclosed and half chicken wire. The enclosed part has nesting boxes in it. The chicken wire part has a roost. The bottom story is enclosed all around with chicken wire. I shoveled dirt on top of the wire on the ground. Is this dirt enough or should I be lining the bottom with something? They seem to enjoy scratching around in the dirt and taking dirt baths. But I want to do the right thing. Also, we put pine shavings in the nesting boxes. I know they are too young to lay eggs (ten weeks old) but I want them to be comfy. How often do I need to clean this out? Help! Thanks!