I will have 2 runs sharing a common fence. One run is 6 x 10 and the other will be 20 x 20. The smaller one is really not a problem as it is small and currently, I have fencing buried around the edge of the chain link dog kennel and a metal roof on it. The bigger one though is tricky. I am hoping for predator proof so I would be able to leave the pop door open at night. How can I span the 20 ft.? I do have some wire fencing available, enough that it will cover the whole roof. Support? Wire the edges of the 4 ft fencing together? Also, the larger pen will be made of chain link dog kennel panels. Thank you so much for any help!!