We have an enclosed 5x10' run with a roof for our three chickens. Since we got them in the spring, we have used a combination of pine shavings and sand in the run. I scoop out droppings every day or two, and so far maintaining the clean run has been super easy. For the winter (snowy) months, I was planning to wrap the run in heavy-duty clear plastic to help keep snow out (to the extent that it is possible), but I doubt that I will be able to keep up the schedule of scooping poop on nearly a daily basis, what with the frozen ground and cold temperatures and all. So my question is this: I have an abundance of maple leaves in my yard right now. Does anyone have any experience using finely mulched leaves in the run and simply adding a fresh layer on top of the old every so often or as needed until spring, when I can clean the whole thing out? What do people generally do with their chicken runs in the winter, especially in northern climates?