I'm new to chickens and have 3, 10 week chickens now. I take great care keeping inside the coop clean, which is easy with a sliding tray, but am not quite sure what I should do for the attached run. Should I put anything on the dirt, like sand? Do I need to rake it up if so how do I take care of the section under the house? I want to build an extended run next to this, attached to the run door, but need to figure out what kind of maintenance is involved with this dirt run before deciding what kind of design for the extended run. Im open to suggestions.