I it possible to provide a secure run and coop on a concrete slab? (I have one that my husband is willing to let me use for my set-up) If so, what would you put down in the run that would be easy to keep clean? Roof for run? New set-up is a Spring project so I'm trying to figure it all out now. An area on plain dirt is possible, but where the concrete slab is is more protected. Open to suggestions and brainstorming. Thanks.