Here's my beautiful artwork: http://imgur.com/a/oLdge It will need some explaining. This will be a 15' x 20' chicken pen/run. I already have my coop. For the pen, I'll be using ten 4x4x8 treated wood as the posts. I will then be attaching thirty 2x4x7 (The picture says 2x4x8 right now). I currently have a 24" deep trench dug out in a 15' x 20' area. I will be burying the bottom 10 2x4x7 that are all attached at the bottom of the trench. I will be attaching 4 feet wide hardware cloth to the wood that will be buried and it will attach to the middle beams 2 feet above ground. So half of my hardware cloth will be buried (2 ft) (vertically) and the rest exposed (2 ft - still vertically) and I'll be wrapping it around the entire perimeter, attaching it with washers and screws. My question: Since I have the bottom 4 feet (2 ft below ground, 2 ft above ground), should I just use chicken wire for the top 4 feet? Will it work to have the hardware cloth where it is? Please let me know! Thanks!