Hey all! I'm a newbie owner. I have a mixed flock of 5 girls who are about 4 months now and have been raised together since day one. Just over a month ago I noticed my white crested polish bantam had fro feathers missing. I used blu-kote and antibiotics and started trying to figure out which of the girls is the meanie. Turns out my silver spangled hamburg is the culprit. I put the polish banty in a large dog kennel in the run and her fro feathers are going back nicely....until today. I got sidetracked and left the polish in with the general population and now she's got missing head feathers again. 
Their run is 6'x12'. Has perches for climbing, dust bath areas, food, water. I take treats down so I know they're not lacking in protein. The SSH doesn't pick on any of the other girls and none of the other girls pick on the bantam. Unfortunately, we've got construction crews on property at the moment so they only get to free range in the evenings after the crew is done for the day. When I free range them they seem fine until they decide to "relax" under some bushes and then the SSH will start pecking the polish again.
I'm at a loss as to what to do next. Any suggestions will be most welcomed!!!
TIA!


Their run is 6'x12'. Has perches for climbing, dust bath areas, food, water. I take treats down so I know they're not lacking in protein. The SSH doesn't pick on any of the other girls and none of the other girls pick on the bantam. Unfortunately, we've got construction crews on property at the moment so they only get to free range in the evenings after the crew is done for the day. When I free range them they seem fine until they decide to "relax" under some bushes and then the SSH will start pecking the polish again.
I'm at a loss as to what to do next. Any suggestions will be most welcomed!!!
TIA!