Unfortunately chicken wire is useful for keeping chickens out of or in a restricted area, but it will not protect them as almost all predators can easily tear, chew, or pass through it and get right to their next meal. 1/2 inch hardware cloth (1/4 inch isn't very sturdy and almost feels more like a mesh) is going to be your best option. I have used chicken wire whenever I had to have something right then and didn't have time to go by the store to get hardware cloth, but I didn't leave my birds unattended until I was able to go back around with hardware cloth. After that experience, I will say that chicken wire is difficult to work with, in my opinion. I believe I had an extra flimsy roll, as it was nearly impossible to get taunt, without changing the octogan shapes in the wire, to a very squatty narrow octogans. Best wishes with your build and flock!