I'm in the planning process for building my chicken run this spring. I have a 24x24 pole barn with a 8x24 lean to type add on. I am planning on building a wall in the lean to part to make their coop. The plan is to get 15 chickens. We just want the eggs and the enjoyment of watching them, and 15 is the minimum order I have found. OK here is the problem. We live in the country with about 80 acres of woods behind us, so yes we have predators. I am trying to figure out how to secure the run to keep them out. My ground is all shale, there is about 2 inches of dirt before hitting rock. It takes a jack hammer to set posts. How do I keep predators from getting under the fence? We have coyotes, foxes, raccoons, skunks, red hawks, and even bald eagles in the area. There are black bear in the area, but unfortunately I don't think there is much I can do to keep a bear out if they really wanted in. I realize with eagles in the area the chickens will never be allowed to free roam the yard, which is too bad cause I have a huge garden for them and over an acre of yard. I am planning on making a door to the coop to be able to secure them at night, but what do I do to keep them safe during the day, I'm afraid that predators will be able to just squeeze under the fence.