Hello, One of my girls has a very dirty back end. Should I give her a bath or will she be fine? Also I am so worried about my girls in the winter time. They have a heated upstairs and warm run, but I am worried that they arent happy or something is wrong because they have not gotten many of their feathers back since October. They dont have worms, I looked, so I am unsure whats going on... Also their coop is super stinky, could this be why their feathers arent growing back? I have been giving them protein and what not but still they are missing some of their breast feathers... am I just being paranoid? I love my girls!