We have 6 adult Barred Rock hens. They have been raised together and seem to do fine. This spring we bought 3 more chicks. We have 1 Leghorn, 1 Rhode Island Red, and 1 Barred Rock. They get along really well. They are almost full size. We tried to put them in with the other Hens. It was horrible. Two of the hens went to the chicks immediately and started pecking at them. I let the chicks out. I am trying to figure out how to have the two groups live together in the chicken coup. The place I have the chicks in now is getting too small.