My flock of six pullets (3 barred rocks, 3 black sex-links) are at that teenage, sometimes peeping, sometimes clucking stage. Two of them, Betsy and Copper, did something very different and very funny today. When I was petting/massaging their backs, they started clucking.. a different type of cluck. Then they dropped their chests to the ground and arched their tails straight up into the air, to the point they were curving over their backs. When I realized what they were doing... I laughed so hard I almost fell off the stool! I told them, "Sorry ladies, there are no roosters here!" I thought they are a little young for that behavior, assuming I am correct in my thinking. Regardless of the reason, they sure looked and sounded pretty silly! Chickens are such a joy!
and here's Copper: