We made a turkey coop from an old hay ring. Following the idea of a hoop house. Here is how it came out. We made a wood frame for it to sit on, added some wood framing to attach plywood for the back. We attached wire to the ring for a support for a tarp roof, added a roost and there you go.
turkeycoop 010 by greyart, on Flickr
turkeycoop 025 by greyart, on Flickr
turkeycoop 026 by greyart, on Flickr
turkeycoop 028 by greyart, on Flickr
turkeycoop 029 by greyart, on Flickr
turkeycoop2 001 by greyart, on Flickr
turkeycoop 010 by greyart, on Flickr
turkeycoop 025 by greyart, on Flickr
turkeycoop 026 by greyart, on Flickr
turkeycoop 028 by greyart, on Flickr
turkeycoop 029 by greyart, on Flickr
turkeycoop2 001 by greyart, on Flickr