I have 3 chickens thatwe got from someone who is moving--two Barred Rocks and one RIR. They haven't been out of their chicken ark yet because we hadn't fenced the garden in, but it is just about finished now so I am ready to let them free range my small back yard (probably about 1/3 of an acre). We have 6' wood privacy fence on two sides (no footholds) and 4' field fence on the other (the house forms the other "side" of the fence). The field fence is very overgrown with vines, bushes, trees etc and is almost kind of invisible behind all the vegetation, but if they hop it, they will be in a power line easement and then the woods. We plan to clip their wings, but should I worry? I will be annoyed if they hop it and come back, but I will be really and truly bummed if they hop it and vanish. Do I need to put something else on the (ugh....many feet of) field fence? Should I worry that since they have only been here a week, they may tend to want to wander? The chickens free-ranged a smaller yard in their previous life but seem very tame.