I'm pretty new to being a chicken mom, but I don't have the segregation issue you described. I have a small, diverse flock -- 2 Guineas, 1 Turkey, 6 Amber Link Pullets and 5 Barred Rock pullets. All the above are female. They were all born on the same day, and I got them all together. They grew up in the same brooder and moved to the coop together. They eat the same food. I later added a mature rooster. They all free range together and whereas I expected the rooster to take charge, the Turkey (Tina) was already the Big Mama of the flock and no one even takes the rooster seriously. They all hang together and do what Tina tells them. I sometimes think that none of them have a clue that they are not all from the same mom/dad. I do see that in my group, the Guinea's tend to stay closer to Tina than the pullets do. And Tina is the only one that can tell them to shut up! If I had to do it over again, I would do it exactly the same. I love it that they all stick together, and I do let them free range. We have a pretty big property that is bounded by forest, but not fenced. I count on Tina to be the shepherd. So far, no casualties.