I'm a Lowe's/Home Depot junkie. I habitually just walk around the store looking for ideas and thinking "What can I use that for?" In wandering around last night I ended up on the electrical aisle staring at the PVC pipe and fastners. Here are my ideas: PVC for the frame and braces of the run Chicken wire to cover the run all over Hardware cloth to double cover the bottom bit and a skirt to keep out predators I'd have to figure out how to make a door in the run. BUT!!! All of that to ask, do you think PVC would be sturdy enough to actually make a chicken run with?