Here is a picture of our nesting boxes. On top of that we have a plastic "poop" tray. At the end of summer I filled the tray with sand. The sand has never really dried out completely and with the cold weather it's become frozen which in turn makes it difficult for me to clean out. I thought of using the clay kitty litter but want to get suggestions as to what may be the best solution without having potential harm to my chickens. Since there isn't a cover over the tray Chickens could eat what ever I put in there. I've heard about the Food DE and Stall Dry. Any recommendations from the group would be appreciated.