I haven't had and real issue with predators. My old run was just chicken wire and I didn't have any issues. Let's hope that luck keeps up. I'll probably re enforce it with welded wire a little at a time
I think it depends on the chicken breed on how fast they lay. Mine are leghorns and they usually lay once a day. I've been getting 6 a day. For some reason all 6 of ours use the same box.