I can't seem to find an answer to my question, so here goes: I have some Marans hens, some blue, one black. The thing is, only one hen has coppering on her head and neck. Is this bad? Also, I have heard that there is a difference between black and 'true black.' Do they lay darker eggs or something? Really, all I want to know is that If I can or should sell their chicks. They are nine weeks, and I have a black-copper rooster. Any suggestions would be appreciated.