I have a couple of hens who are getting picked on by the other hens. I need to come up with some ideas to entertain the flock. I have 15 hens and 4 guineas in an 8'x8' hen house with an 8' x 16' run. I tie a head of cabbage by a string hanging in the run daily but that only entertains them for about thirty minutes. I can't let them free range. Too many cayotes and bobcats.