My first flock was 9 birds, 6 breeds. When I decided to go back to school we found out that my wife was pregnant with our second child so we decided it would be too much work for her and I would have no time to keep up our flock. Six months after my son was born my wife told me she really wanted chickens again so I built another coop and we got 3 chicks from a local breeder, 2 Wheaton Ameraucanas and a Black Sex Link. Fast forward 10 months and BOTH of our Wheatons go broody at the same time (egg production cut to 1/3!!!). Well, after some research I saw that getting a chick for each hen would pull them out of being broody and they would protect that chick from the rest of the flock... plus you all know how chicken math works... So I convince my bride that 2 more chickens would be a good idea. As luck would have it, the day I got the chicks (another Ameraucana that will look like a hawk and a Barred Rock) both of my Wheatons broke from being broody on their own. So, I looked in to integrating the chicks into the flock. I kept them physically separated but still able to interact on the existing flock's terms for about 3 weeks. For the past couple of weeks they have not been physically separated and we have had no negative instances of the original flock (which was quite peaceful to begin with) being aggressive towards the newbies. The two Wheatons were the ones that were most aggressive/curious to begin with, which surprised me b/c neither of them are the head hen. So this brings me to my question: my chickens free range nearly 100% of the time. I am glad that I don't have any problems with aggression towards my new chicks but when they head out of the coop in the morning in to the yard it's like I have two flocks. The 3 hens keep completely to themselves and the 2 chicks keep completely to themselves. The hens don't try to interact with the chicks, and the chicks don't try to interact with the hens. Part of me thinks this is for the best on account of not wanting any attacks, but I'm used to seeing 9 birds (my first flock) all move as one flock and now it feels like I have two flocks. So, when can I expect the two flocks to unite?