How do some of you use tarps in your coop or run. I find them to be great over the floor of the coop and up the walls about eight inches to hold the wood shavings. Comes time for cleanout, simply unscrew the screw/fender washer holding the tarp and drag out all the "time to be removed" dirty shavings. Does anyone now or plan to use tarps for interior walls or exterior walls for winter? In or over the run? Anything else?