Silkies are not the only black skinned breed...what about sumatras? Additionally, there are many breeds that have a copper mantle like that. Anyway, we could use more info. OP, does she have five toes on each foot? That is a dominant trait, and if she was a silkie mix, she should have five toes. Is the egg in the picture from that hen? If not, what color/size egg does she lay? As the others have stated, in order to give you a good idea of what she is, we need to see her standing in a natural pose from the side (if you can include her legs and feet in the picture, that would be helpful). Is she a standard or a bantam?