I have altogether 10 chickens. I've had 8 of them since they were a week old, and I just traded one of their brothers for two 4 month old Lakenvelder chickens. We've had quite a few issues with their flighty-ness. We started them in quarantine and they kept escaping from the run, so we moved them closer to the other chickens and they were still escaping and going into the other coop, so now they're all together. They've been in the same coop for three days and we let them all out to free range when we get home from work. During free range time the two lakenvelders will roost inside the coop but when it's time for everyone to go to bed the two are found high in a tree. We have been leaving them out all night but I worry about them and I don't think this is good for the flock. Any ideas on keeping them in all night?