I am working on a run area. Some walls are going to be solid, but the non solid walls are 2x4 welded wire. I was thinking about running a knee wall around the inside, at least 6 inches from the outside wire, to keep the birds from coming within grabbing distance of any racoons. Has anyone ever tried this? Does anyone have a good guess as to how far a racoon can reach? Imagine a 12' x 18' run space. 2 walls are solid wood. The other 2 walls have 2x4 welded wire that is on wood 4x4 posts with 2x6 wood top and bottom (that wire is sandwiched/nailed between two pieced of wood). Inside that, there is a second chicken wire wall, only intended to be strong enough to keep the chickens away from the outside wire. I definitely have racoons in the area. Any help is appreciated.