Wonderful! Mine are free range also, which can create a problem, but that is my favorite way to have them if at all possible. I lock mine up at night though, like you do.
Oh no. I'm so sorry. You are doing all you can do, and seem to be doing a good job from what I can tell. Once a hawk knows where a good food source is they will not stop, and looks like he bought a friend. However, if you keep working at it I think you will be okay as long as they are securely...