Thank you so much for all of your help everyone! I have done what you guys have recommended, left the run open when I am supervising, and they have done great. They where actually much braver then I thought, and started exploring the first day. They stay very close within the coop, but each day they go a little further. Whenever they hear a noise, or see a hawk fly over, they run back into the coop. With behavior like this, when do you guys think they can free range without supervision? Thanks again so much!