I bought 4 straight run chicks...turns out 1 pullet and 3 cockerels. I suspected as much when the first 2 cockerels became apparent so I went back to the breeder and bought 4 more straight run chicks. This second set of chicks is 4 weeks younger than the first set. As soon as the younger ones have all their feathers I'm hoping to merge them with the pullet from the first set. Then let them grow out together before introducing them into the flock.