I have 4 separate flocks living in separate coops, but within 5 to 6 foot of each other. My bachelor flock consists of three 13 month old roosters, my big girl flock consists of five 12 month old hens, my teenager flock is a mixed flock of three 9 month old cockerels (always kept separate from the pullets except for after dark/sleeping/roosting) and six 9 month old pullets, and my baby flock which is a mixed flock that consists of five 3 month old bantam cockerels and five 3 month old bantam pullets. The teenager cockerels free range all morning and afternoon and then the hens and Pullets free range during the evening. The baby flock does not free range and I've found that this flock is consistently going to roost for the night around 5:30pm. Sunset isn't until 8:30pm. They can see other chickens walking around so I'm not sure why they're doing this. The free rangers seem to wait out the very last light before going back up and I'm OK with that as long as I'm out with them. They've only been outside full time for about 4 weeks now and have been like this the entire time. Whenever I was bringing them inside at night, they would be outside until I finished getting everything done, usually around 9:30pm, so it's not a habit, I don't believe. I've had to stop someone from trying to scare them out as I want them to feel safe in their coop. I do put food in their coop, but I know they don't get down from the roost because it's so dark and anytime someone has fallen down, they stay on the floor until I come out to check everyone before bed, and I give them light to see to get back up. I don't have a problem with this, but I worry about them being cooped up for so long. Sunrise is at 6, but I don't let anyone out until 6:30 am since I've learned about how active predators are at dusk and dawn. Thoughts? Thank you