I have one chicken that is left out from the rest and does not seem to be very accepted by the others. When they roost at night they all roost on the same spot, but 5 of the chickens sit tight together and the 6th is left out to the side. They are all 8 weeks old and have lost their down except for this one chicken that is left out around her neck. I don't know if she is keeping herself out of the group or if they are leaving her out. I am concerned that they may be bothering her because her comb looks a little damaged. Has anyone experienced this before?