We are currently trying to figure out how to build a run/coop for our hens. The plan is to make the coop area inside our shed, with a run outside. As I look at all these mobile-type coops, I am realizing that due to their movable nature there is no buried wire or anything to keep predators from digging under. (Duh!) Does that mean that chickens are less safe in such a coop, or is the concern more of a worry at night, when they would be locked inside the coop?