We wanted to build a chicken tractor to pull around the yard and keep laying hens. Over a couple of months we have adapted our ideas and finally ended up with this structure, which has far more connectors than if we had 1) bought a bender and done hoops or 2) made it a shed roof style. It is 10ft plus connectors long and 8 ft plus connectors wide, and about 5.5' tall in the middle. There is wire bracing along the sides at the door end and in the door itself, which uses the eyebolt hinge idea. To get it braced strong enough for being lifted and moved (or used by children as a jungle gym while we built it) it took a fair amount of bracing and we didn't have much of our ten sticks of 3/4" conduit left at the end.

We intend to add more tarps or plastic as needed for weather and cold protection, but since I found an idea for very nice weather proof feeder (eye-bolt with toggle on the bottom of the bucket), we don't need to worry as much about keeping feed dry. We used zip ties to fasten the hardware cloth (1/2 x 1/2 critterfence) and crossover clamps and pipe clamps to fasten the wheel lifts. (Eddie Bauer scrollers are strong and a bear to take apart, just FYI. Probably would have been simpler to get a couple more lawnmower handles and front wheels.)The predator guard is probably overkill, made of pvc we had and heavy duty 1" x 2" fence from Tractor Supply. Still working on the latch idea, but I think we'll just add two sliding bars or pipes, one inside and one outside so no one can easily get locked in. Maybe it will have a bungee or hook to prevent accidental/racoon sliding. We will also wrap the outside of the laying boxes with hardware cloth and plastic to keep rain and thieves out.