I have four chickens, three are hens and one is a roo. One of the hens is particularly vicious to one of the others. Their coop is 4x4 with an attached run twice that size and they are let out to roam almost every day for most of the day. They also have a self feeder stocked with corn and dry feed. She (Esther) aggressively hunts food all day while they are out roaming. She doesn't nap like the others. She is beautiful and healthy, definetely not losing weight, I think she is just food obsessed. They were also all wormed with Wazine about 6 weeks ago. The feather plucking on my other hen has to stop. Esther is constantly chasing her down and harassing her. Is there a deficiency of some sort going on here or is she just mean? I'm considering getting rid of her if she doesn't stop, the problem is she is my only regular layer. Thank you for any advice!