I have three Barred Rocks and three RIR. Two of the rocks really love to be with us, they love being held and wil often go to sleep on my or my wife's chest and stay for quite some time. Tonight I was sitting with one of them and she came up under my neck (I wear a close beard) and was going back and forth rubbing her head along my neck and sometimed behind my ear and making the most curious little 'peep, peep, peep' as she did. It was a very quiet almost low whistling-like peep and she would lie down for a while and do it again and again. Is anyone familiar with this behavior? Is this something they might do with mama if they are being brooded by their mother? By the way, she is just four weeks old. It was the cutest, most precious behavior that I've seen but I have no idea what she was doing.