I have been thinking of this a lot lately and I have decided to build a pin/coop that I can take apart when I am through with it and then put it back together when I need it again. I recently lost my rooster to a coyote and have been looking for a replacement. I have seen roosters and hens offered on craigs list but I found that I have the problem of not being able to isolate them from my other hens in order to insure they do not have any diseases. So what I thought I would do is just buy some 2x4 lumber and frame out some pannels that I could bolt together and then unbolt. I have a roll of welded wire fencing that is 4 ft high so I thought that I would make a run area 4ft high x 8ft long and 4ft wide. I would make the front of it a door that would swing open and the back of it would have a small coop area that bolts to the run. Right now I have all the ideas running through my head but I am going to start on this soon because I am going to go up to a sale this weekend and hopefully come back with a new roo and maybe some new hens.