after nearly loosing one of our girls, thier freedom will be taken away. we are planning on building a large fence, 50x25. we are not planning on putting a top on the pen. we have RIR's and Whiteleghorns. we have then in a dog pen that is 5 feet high. its just 12x12 and they show no interest in flying out. my question, I know that one may fly out every now and then but do y'all think 6 feet will be ok? we hate haveing to pen them, they loved the forraging, and we liked watching them, but a dog put an end to that. we will have a varmit barrier arround the fence to keep the diggers out. they will be locked each night, and we think they are too big for our hawks. anyway they have been freeranging since they were 8 weeks.