I am new to chickens. I just got my baker's dozen of new babies last week. I have been planning this for months and have been reading all I can on the subject of raising chickens. My wife and I are constructing our 12' x 24' run with 4x4 posts every 8' and 2"x4" welded wire. I attached 1" chicken wire inside the welded wire and outside the run to discourage diggers. I hope this will keep raccoons, possums, and foxes out. I am considering covering the top with more 2"x4" welded wire or should I use something else. Is this needed or am I being paranoid?