I made a coop addition. So now my coop has two 4x8 sections with a sliding screen door as a divider. I have one barred rock and two isa browns over a year old in there now. I will put two black australorps in the other half. They are 13 weeks old. If I let the birds see each other thru the screen for about two weeks can I let them mix after that. I want to go today and get two buff orpingtons and another barred rock (chicks) and I will put them in the 4x3 brooder that the austrolorps where in. Last week I tried putting the australorps in the run when just one of the isa browns was out. She flew with here feet first on top of one of the australorps. I never integrated before and I am afraid of them getting hurt. That isa was the bottom of the pecking order and my most docile chicken. Please help. Never did this before and I am afraid of them getting hurt.