I have six 6-week old chicks and three 4-week old chicks. The older girls have moved out to the coop and are thriving. The 4 week old chicks are about half their size and doing well, too. I want to work on mixing them together so I have been bringing the younger ones out to the coop during the day in a separate section of the run separated by chicken wire. They can see each other but can't get at each other. I've brought the big girls over to meet them and they definitely chase the little ones and will peck once or twice at them and then go back to whatever it was they were doing. The little ones are scared to death and huddle together in a corner. Should I just let them work out their pecking order all together or keep them separated still? I didn't think it would be this tough since they are only 2 weeks apart in age. Any advice from all you experts greatly appreciated!!!