I currently have a dirt-floor 8x8x3 run that my 11wk-old girls spend all their time in (their coop addition is slow progress). We have had several days of steady rain a couple of times now, and the floor of the run is an absolute mess. I am on a rental property and will need to return this patch of "it wasn't grass anyway" to a green-ish state by the time I move out around August of next year, so I need an option that isn't terribly land-altering (no concrete, etc). We have several large oak trees on the property that are just starting to lose their leaves, so I'm thinking a good amount of leaves will end up in the run for the late fall and winter. However, I'm at a loss for a bedding material that doesn't have to be cleaned out every time it rains (the "roof" is a 8x2 panel of corrugated PVC that covers half the roost and the food and I can't afford to spend any more on materials). Any ideas are MUCH appreciated by myself AND the chickens, who I'm sure would love to not be lying around on their soggy poop!!!