The juvenile plumage of the double dose pied may show smoky gray especially on the head. None of the fanciers nor the books I saw told me anything about other kinds of white. So I was surprised to get out of pastel family and related families, a recessive white, that I doubt is the pied type. This is likely to be lost before I can test it properly, since very few are taking enough of my stocks to hold over for my return in a year. It is supposed to be a dominant, but may have dosage effects of the mutant gene.
More work is necessary.
So the males have no throat scaling, no chestnut flanks, and no rusty cheek patches. It is a sex-linked recessive. So it is often called chestnut-flanked white. Interactions of these mutants are interesting in effects. Brown with silver shows a beautiful silver effect with brown edges on the feathers.