I have a chicken that seems sick or injured. She can barely walk. She just kind of moves slowly around. She can't go up the steps and I keep finding her hiding. She also isn't eating much. I've tried giving her bread and egg shells. She takes a couple of bites and moves on. She is the first to go in the coup at night and the last to come out in the morning. Not sure if she is sick or injured. And if she is sick can she spread it to the other chickens? Should I be feeding her something special? Should I bring it in the garage and do we have to be careful for any disease from it? Any and All advice will be welcome. Thanks!