We finished building our movable chicken coop yesterday. It is made out of PVC pipe, a little re-bar, some wood reinforcement, chicken-wire, and a tarp. It houses up to around 25 chickens and is light weight so that it can be moved each day. So in addition to their feed, they get fresh grass and bugs all the time. A friend of mine designed the coop and sent me instructions on how to build it. The kids did a great job helping me build it. Our little chickens moved into it yesterday and seem to be happy. So far, so good.