We have two flocks that share the same pen. The original flock is one rooster and 9 hens. In August, one of the hens hatched 7 chicks which turned out to be 3 roos and 4 pullets. The mother hen did the maternal thing for two months, then returned to the original flock. Each flock has its own coop which are both decent-sized. The last couple nights, one of the young roos has been roosting with the older flock instead of his clutch-mates. Any ideas about why? Thanks!