There are some threads about building roosts with poop catch trays. I will try to find them. I have a wire pit in one of my coops under the roosts. I think the birds do most of their pooping when they're on their roosts. My coop with the poop pit definately stays cleaner than the coop without. When I build my new coop, it will definately have poop catch trays under the roosts. I saw some at TSC for rabbit cages. I think they would work fine in a chicken coop. There are pictures on my BYC Page of my coops.