My small flock at my school has five white feathered chickens, four Isa Browns, and 1 RI Red. We lost one Isa Brown about a month ago to unknown causes. Now I know what it was. I have one or two white feathered chickens pecking the feather off on the lower back of three of the Isa Browns and some on the RI Red. If this continues they will eventually draw blood and it will be over. What do I do? Do blinder stop this from happening? What are my options???