I have a 2 year old Barred Rock. She is extremely social, intelligent, cuddly, active, a good layer, but very territorial because she is alone in the coup. She is the boss of the dogs and cats, but I want to grow the flock. I'm nervous she will be very aggressive with other hens. I have integrated other hens before, but all of the same breed and age. Does anyone have advice or experience with certain breeds integrating better together than others? I am looking to start off with 2 additional egg layers.