We have 7 hens. Two are about 2 1/2 years old and the other 5 are 1 1/2. Two of the younger ones have begun picking on one of the original girls - they chase her down and peck on her head. The one being picked on has almost always been somewhat of a loner.
They have lots of room - their "coop" is a stall in a barn and they have a large fenced yard. There are 6 nesting boxes so that's not a problem either. They seem to be fine at night when everyone is roosting; it's just during the day that they are harassing her.
Is there a chance that this will stop or do we need to intervene?