I know...sounds like a really silly question, but I have to ask it. In our new coop, there is plenty of roosting pole room, 2x4's wide side up, enough room for all, and every night, all 6 nesting boxes are full of hens. And to be honest, whatever, if they want to sleep in them that's cool. Except...and we all know what the exception is. They dirty the boxes up. The hay is nasty every morning. We have sand for the coop floor which seems to be working out very nicely. Is there any reason that sand couldn't be used in the nesting boxes? Please state the obvious and not so obvious, because I am really considering it.