I knew that my BCM hens did not like their scrawny new rooster, but when I hatched out a batch of their eggs, most of the chicks were blue. The only explanation is that they must have been visiting my lovely splash rooster in the pen next door. I never suspected because they are in their own coop each night when I lock them up. It looks like I need to inspect my fence and get a rooster they like if I am going to have any BCM chicks.