I currently have 3 chickens, a barred rock roo, a rir hen and a cochin banty. They are about 15 weeks old. I am buying 4 hens about the same age from a friend. I do not plan to quarantine them, one because it would be quite difficult and 2, I know that her birds are healthy and well taken care of. Of course I will check them for mites/lice before I take them home. What is the best way to join the 2 flocks. My chickens live in an 8x8 coop and free range always. We do not have a run, but we could put something up temporarily if needed. Do I need to separate them when they sleep for a period of time? Keep the new chicks locked up a few days? I am totally new to chickens in general, especially this aspect! Thanks for your help!