I have a flock of hens that have been together since hatch, a year now. Today all of them started to single out one hen and peck at her. I have her separated, in the coop, for tonight because she has a spot on her back that is raw from the pecking. I know that sometimes they will do this out of boredom or limited space but they have lots of room to roam and I try to supply fresh veggies and other things for them to pick at throughout the day. I did notice the injured hen and another trying to squeeze into the same nesting boxes this morning. There are 5 nesting spots for 15 hens yet they continued to move from box to box pushing and pecking at each other. Any suggestions for me?