On my computer, I see what looks like white tipped nails as well as some white on the beak of the one facing the camera. What causes this when the original eggs from GFF seem to produce almost all black chicks, as they are supposed to. I understand that GFF also has disclaimers on this breed. Just curious on the genetics associated with this breed. If they are pure from the beginning, they why would these imperfections not be pure as well?