So I had to separate a buff orpington from other chickens because repeatedly they kept torturing her to the point of removing all her head feathers and making her nose bleed. She's all better and heeled. She really misses being with other chickens. I don't want to add her back with the same age chickens(one year olds) I have 17 4-5 weeks old buff and Easter Eggers. How old should the babies be before I combine the two if possible. She's sweet but freezes when attacked. I'm planning to put her cage next to theirs before as well.