I've got some 7-week old Australorp chicks... looks like 8 little cockerals and 6 pullets. They free-range during the day, but run around separately from the older hens and rooster, doing their own thing. At night they all return to a single pen and coop. At what age will the rooster become interested in the pullets? And when might he challenge the cockerals? I don't plan to keep all those cockerals, by the way, but am curious about how this works.