Here is my new coop that I built this spring. What should I use for bedding inside my coop and nesting boxes? I have sandstone in my run and it works well, they poop and then it rains and filters through the stone a down hill into the yard. I also have a small section filled with sand where they can roll. I will cover it in the winter so i guess i will have to put some bedding in there to. I have a total of 9 birds.