Hi, everybody! My 7 chickens have been happily roaming our fenced in front yard, but we've decided to build them an enclosed 20x20 ft run in the back, in order to "reclaim" our front yard (and keep ourselves and our guests from having to zig-zag around dozens of piles of chicken poop on the way to the front door.... We live in Georgia, and my questions is, how to keep the run predator safe, since it will be in our unenclosed backyard, and directly bordering a wooded area. I really don't want to use concrete around the run, since it will be so hard to remove in the future, and was wondering what kinds of other options I have to keep predators from digging in. Also, do you think it's neccessary to enclose the top (the run will be 6 feet high). Any advice will be greatly appreciated.