I purchased (5) new baby chickens early in the spring and little by little I have been introducing them to my other (5) chickens that are just over a year old. I have one older chicken (Lily) that is just "mean" to the younger chickens. How do you break a chicken from being mean? Lily chases the younger ones all over the yard to peck at them and when in the coop she corners them to peck at them. I had a wall made of wood and chicken wire for a couple of weeks that separated them in the coop but allowed them to see and smell one another...I have since removed the wall so that the younger chickens could go outside at will but Lily will not let them leave the space that they were originally quarantined to. I would like for them to commingle and go between the coop and fenced yard at their leisure but that does not seem to be happening.