I keep seeing y'all mention DE, which I finally figured out was Diatomaceous Earth. Why and how would one use it? Also, I don't have a droppings board for my 8 hens in a 6X12 indoor coop attached to a 8x16 outdoor run. Do I need one? I live in Reno where it is EXTREMELY dry. I just have very deep straw indoors and change it spring and fall, in the meantime I just stir the droppings under the roost into the existing straw and it dries out and dissipates. Is this bad? Thanks!!!