I have an 9 month old that has become seriously antisocial. She sits in the next box day and night. I have no idea when she comes out to eat though she must as she's been doing this for a month and doesn't seem ill physically. It matters little if there are eggs in there or not. In fact she seems to be laying quite a bit less than the other three (all of whom seem to be very NON brooding). I never saw her being picked on by the other three so I don't know what might be causing her to want to brood over no eggs. Is there anything to be concerned about here (other than the lack of eggs)? She's a Buff Orpington and has a Buff Orp sister and two black Austrolorp sisters...all the same age, raised together since chicks.