I let them out the last up to 3 hours of the day. There are hawks in the area-I see them daily. The flock is pretty good about staying under tree cover...mostly. They will spend some time in the open...sometimes. They have learned of a world outside the run and have their favorite spots. They had gotten out one morning and I thought I could spread treats in the run and they would go back in. Nope, they took turns going for treats. A while back I did lose one presumably to a hawk, but there was no evidence. She could've just gotten lost...something else could've gotten her. Really don't know. In the end, I just accept the risk that something can happen when they have free time. I don't know if this helps you at all @FL_chick. Sorry if it doesn't.