Wow! I didn't know that either. I have a silke rooster with markings who's supposed to be a purebred silkie. I have a white rooster too, but I'm not sure he's a purebred silkie. I think I have crosses of silkies in my flock. I have 1 surviving hatched peep who is solid black. The other one who hatched, but died, was a yellow peep.