I'm getting ready to have a nice big fenced in area for my chickens, probably 7 ft high and I plan to put a wired top on it or else it would be pointless. If anybody has done that, please tell me the best way to do it. Since I'm planning a really big pen, about 20 ft X 14 ft (at least), I guess I'll need an extra post or 2 in the middle to support the top wire. Anybody know what type of wire works best for a top like this? Thanks!