Recently, I have been worried about one of my chicken's attitude, she is a barred rock that lives with 3 other sex links. My BR is slightly younger than the other three sex links, and she has been acting odd lately. We originally bought her with another BR, but she passed awhile ago (4 months ago). Winter, my BR, has lately been shifting away from the others and is at the bottom of the pecking order. For example, sometimes she sleeps on a different perch from the others or forges alone. She also hides in our bag of flakes for a decent amount of time and makes quiet awkward sounds I usually don't hear from the others. Her tail is still up though, and her poop looks normal, but she sometimes gets pecked while eating. Is it depression or I'm I just paranoid? How can I fix it?