Poor thing. What percent of protein is in the feed you are giving them? You might feed some extra protein now during the molt to all of them. Feed stores usually carry a gamebird feed or meatbird feed that is 24%, which can be mixed with layer. Or try 20% Flock Raiser instead. The BluKote may help hide the red and help to prevent pecking, but some say it attracts pecking. I have had good luck with it though. Make sure they are not overcrowded, and are getting out to free range. Molting chickens usually do not like being handled and feel rather lousy.