I have plenty of roosting space for my entire flock but only about 10 of the 64 chickens are actually using the roosting bars. The others gather near the "person" entrance door on the coop floor. (I know this because I can peek in a crack above the door). Is this the result of the older hens not letting the rest use them or lack of interest on the rest of the chickens part. How do I get the others to get up off the floor? Or do I even need to concern myself with it? I believe my coop is safe enough but thought more of them would actually act like chickens.