have 7 ladies. two roosts in the coop -- lower is about 18 inches off ground, second is like 36 inches off ground. Lately I see 3 or 4 flying up to sit on the 2x4 that is up around the roof line (inside the coop). They are about 14 weeks old. I keep the nesting boxes off limits and they cannot sit atop the boxes. Should I block off the access to the higher spot where they are sleeping at night and get them back down on the roost? Is it their behavior like beginning to feel the way to lay??? This is my first time with chickens. Live in a suburban setting, they have a full enclosed run in the daytime. Any help would be appreciated.