I go into the hen house nightly to male sure the girls are all settled in and have enough of everything and also to clean up what was put there from the morning. As I am doing this, one chicken will almost always jump on my back. As I stand up, she will walk right up and sit on my shoulder. Zit is usually one of my RI Reds but sometimes it's another. Is this a form of friendship, dominance or something else?