Has anyone tried a pen like this (but perhaps made out of 1/2" hardware cloth panels)? I am thinking of making panels, maybe 2' h x 3' wide, and putting 3-4 together on a "string" with hinges, so they can be folded to carry. I'd make two strings. I'd then add a dog house or portable shelter on wheels. Has anyone tried anything this, and how would it compare to a rigid chicken tractor? I have a tractor, but it is an a-frame and I find it awkward to move, plus I am worried the rangers won't go up to the second floor to go inside... Thanks for any knowledge.