Update: I asked my dad and brother what they have (they live nearby) and apparently my brother's run is only covered with a tarp. He has had problems with wild dogs and coyotes, but has never seen any raccoons. My dad uses bird netting. He has had issues with predator birds, but never raccoons...
We are building our chicken run. It is 6 feet tall and we made the sides out of welded wire. We thought that chicken wire would be sufficient for the "roof" but are now realizing that maybe raccoons could get through it. We wanted to make it secure enough that we could leave the pop door open at...