We used one with hardware cloth wrapped around the bottom edges to keep the coons from reaching through. It had a bigger chain link section to go over the top for better security and covered it with tarps when the weather turned inclement. Picked it up off of CraigsList for $50 last spring. But our flock got bigger, so we started letting them free-range it in our chain linked 1/4 acre section around the house. We now use this smaller chain link dog run for the baby chicks to practice scratching around outside in and to slowly introduce them to the rest of the flock.