My red sex links lately have been chasing around all my other breeds and pulling out and eating the fluff feathers on their rears. They do not do it to eachother only every other chicken. They sneak up from behind rip out a couple and run. The reds fight over whos gonna eat them, but they do eventual get eaten. Im a little lost in what i should do to change this behavior. All day long a different chicken is jumpimg in the air after getting pecked in the booty. Any suggestions?