I had a broody hen this summer and 2 out of 5 eggs hatched. All was well until her sister who is a Golden Comet started to become broody and take over being the mother of the 2 chicks. They were about 9 to 10 weeks old when this took place. She became mean and started going after her sister (the real mother). She also is molting now on top of it. Not only is she mean to the sister, she is pecking at the new chickens she wanted to mother. While all 9 of our chickens are out foraging and I am watching them, she will go after her sister and stand over her and yank freakin hard on her comb to the point that one of the tips is pulled off. I have noticed that she goes after the combs on the chickens when she wants the prime wall spot of the perch. She also pecks at their feet. We have a chicken tractor and she has been banished to it at night time while all the rest are in the coop. Please tell me why she is so nasty? I want to see her integrate, but she is just so mean spirited that we are on the verge of cooking her. Are the chickens just upset that there are two new chickens that were hatched this summer? We don't know what to do.