We are evaluating the best location for our first chicken coop. We have a slab of concrete back by our shed (which has electric and water access already). The location is perfect for a coop (thinking the size for about 8-10 egg layers). I'm thinking that the concrete is not a good flooring for their run, but would work for the coop foundation. Is there anything I could put down on the concrete to make it work for their run or part of their run? Or should I just give up on that idea, and design a run that goes onto the grass? Thanks in advance!