I had a plumber fixing a pipe earlier and he happened to have a trench digger with him. I had him dig out a 20' by 15' rectangle so I can bury hardware cloth. I must admit, I'm not by any means handy at all. How should I go about burying the hardware cloth? I have some 4' wide hardware cloth. Should I stick 4' into the edge and wrap it to the other side, covering the entire bottom of the run? Should I just stick it in vertically and attach it to my poles and fence? Please help! Bonus question: How many chickens would be good in this 20' by 15' area? Thanks!!