I purchased a Mille Fleur chick along with several others from My Pet Chicken hatchery. The little pullet hatched on the 22nd of March, and is already starting to feather out. But she has only brown-red and black in her feathers. No white mottling. If she were a serama, I'd know better, but she's not. When will she get the white, or did I buy a mutant chicken?