We got rid of our last rooster that was supposed to be a hen. Out of our 9 pullets, 4 turned out to be boys that we had to relocate, and two vanished. We have three girls left and are planning to add more soon but have decided to make other arrangements before than. We only plan on having hens and without the roo we have decided to shorten their amount of free range time since we live in a very wooded area. We put a large enclosure around their coop opening for a closed in pen area that is about 4' high. Is that enough to keep them in when we arent home? They are Orpingtons so they are very large and I havent seen them fly over 1'.