I have 2 chicks, now 3 months old, that were raised by a broody hen. She clearly felt they were old enough to be on their own a few weeks ago, though the chicks continued to sleep in a nest box with her at night. Now the hen has gone broody again and the chicks are in the nest box with her during the day every time I go out to check for eggs. Is this normal, should I be intervening or just let them work this out for themselves. Advice, thoughts would be much appreciated.