I grew up with chickens on a farm until I was around 12... mostly RIR's and Silkies and some "mutts", LOL! I went without chickens for a very long time. Currently, I have five hens that are 3 1/2 year olds now (3 brown/red sex linked, 1 gold laced wyandotte and 1 silver phoenix). This group of pullets are 12 weeks old and I got them when they were just a few days old (3 barred rocks and 3 black sex-links). I wasn't able to dote on the older hens when they were young like I have these pullets. Anyway, I've never had a chicken nearly do a somersault when getting a back rub before... It just cracks me up... and the funny cooing cluck sound she makes! The funny thing is I'm barely putting any pressure on her back or sides, just very gentle pets and that's what she does. Funny stuff!