Below you will find a picture of the chicken coop and enclosure. The enclosure is 6 ft x 6 ft. We are not allowed to free range chickens here. I am trying to come up with an idea to add an addition that can be light and easy to move. In order to do this I need to create some kind of tunnel for them to pass through and another enclosure at the other end. I thought the enclosure frame could be made with about one inch PVC pipes covered with chicken wire or hardware cloth. The only thing I can't figure is what to use for the tunnel. It would be attached to a panel that will open in the back of the main enclosure. I am thinking of something like a clear plastic with some kind of rings spaced evenly inside for support. Any ideas to add to this will be greatly appreciated by me and the girls.