Since I started putting all new chickens in quarantine (two areas of my yard with a 12m barrier between them) there have been no issues with integrating new chickens. They can see each other through the fences and across the gap and can talk to each other but can't come into contact. By the time I introduce them face to face it's as though they're all old friends.Rod, how have you gone about introducing them? For me, the easiest way has just been to plunk new arrivals in with the old ones, and let them settle things on their own, but some swear by using a wire separator between them for a while so that they can see each other but not get physical about their disagreements. Also, I think it's easier to have some sort of balance when introducing new ones. Putting three older ones in with 6 young pullets work, or if they're the same size and age, combining equally sized groups. Of course, the groups you start with should get along by themselves to begin with.