I have a hen who has gone broody in a little mini house/child playhouse type thing that we turned into a coop, and I would like to build a run attached to it so they can go outside. It opens out onto a concrete surface, just curious if anyone had any suggestions about building coops on concrete. also i realize i'll have to pick up a lot of bedding for them and concrete isn't ideal, but the house was so ideal for a broody hen i just felt like it was the best decision.