THIS is what I've been looking for! Thanks @Christie Rhae for posting on this!
Oh, 2012. So, I guess I'm just a little late to the party XD.
I'm planning on maybe someday doing something like this only I'd have the whole thing inside of one huge run/fence and I'd cycle through which groups of chickens would have run of the run. Eg, let pen one into the big run on Sundays, let pen 2 in the big run on Mondays, let pen 3 into the big run on Tuesdays, Etc...
I'll have to do something like this. When I do mine I'm going to use the right materials in the right places so that I could use any of the pens as pretty much anything short of a cow. quail/chicken/duck/turkey/guinea/rabbit/swan/geese grow out/breeder/brooder pen, sow/potbelliedsow/ewe/doe/possiblyevenminicow birthing pen, bratty brother containment pen (jk), etc...
Again: thanks sooo much for posting this! I hope to use it someday.