Hi, I have 4 chicks, 5 1/2 weeks old. I have 2 Production Reds and 2 SLWs. I've noticed that the birds tend to self-segregate by breed. I let them out for some supervized free ranging a couple of hours each day day and lock them indoors at night in a temporary coop made out of a couple of washing machine boxes. I expanded to 2 boxes because at night the birds fight for their favorite side of the roost (which changes from night to night) and it seems it is always the SLWs vs. the Reds. My SLWs are bigger, but what the Reds lack in size they make up for with noise and ornriness. With the two boxes, sometimes the Reds hang out in one and the SLWs in the other (there's a door in between the two so they can go back and forth). I should add that overall the birds get along, the 4 of them stick together when they are outside and if one of them is separated the other three get anxious, regardless of who it is. But when they're outside durring the day, usually they pair up with the one that looks like them (Reds dust bathe while the SLWs scratch, Reds drink water while the SLWs forage, etc. My dad says he thinks it's just a "Birds of a feather flock together," thing, since the ones of the same breed have similar personalities. The SLWs are friendly and ike to stay close to me, whereas the Reds are more standoffish. The Reds are loud, especially at night, and the SLWs are quiet, etc. Also for a while the bigger SLWs could jump up on the roost easily while the Reds had a harder time and preferred sleeping on the floor. Now they all roost at night, but usually the Reds roost on one side and the SLWs on the other. Do anyone elses birds group themselves by breed?