I'm guessing this is normal. I have two 7 week white cochin hens that I move into a grassy area during the afternoon. I also have two 3 week old partridge cochin hens that I just started putting out in the same area for a short while - it's very warm here, in the mid 80's. The whites don't attack, but one will wonder over and peck the heads of the others a few times and then leave them alone. No blood, just seems like she's establishing herself as boss. Am I correct? I was hoping that doing this would get them used to each other and make the final transition smoother.