The safe question has been answered, as for integrating, we put a smaller pen inside the chicken house. they can see each other, and interact through wire, but cannot pick on one another without supervision. then during the day everyone is out together, at night when they roost together, we no longer separate them. while picking is going on, separation. it has taken about a week or so to integrate new members with little fussing and no injury so far.
RobertH
RobertH