My broody hen is nearing the end of 21 days (Tuesday). She has been locked in a large dog crate which has been kept in my coop with the rest of her flock. A little background before I ask my questions; My coop is divided into two large rooms and one side is divided into another two rooms. My current flock of chicks (175) occupies one half, and my older flock (20) occupies the other half. My chicks are needing more space and I am going to push my older chickens into one room (with roosts, nesting boxes, and outisde access). This will give my chicks 3/4 of the coop. 1) Do I keep my broody hen with her current flock or let her (and her chicks) in with the big chick flock? Where will mama and chicks be safest? 2) If she is left with her flock will her chicks be safe from the older hens and roosters? 3) When can I open the crate and let mother and babies out to explore? Thanks in advance.