We just got 3 red sex links, and 3 black sex links which are 3 weeks old. One they are old enough they will be moved out to a 10x12 coop, and a run that is 25x36. It will be fenced in 4 ft chicken wire. I'm hoping that they will have enough room and decide not to fly over. Do you guys think I will have an issue? Also eventually I would like to allow them to free range on our 10 acres.