as you already know, Birchen will produce black chick down, just like Extended black chicks. that goes for silver birchen or gold based birchen. now silver birchen with dominant white will produce all white birdsright, but mine are pied mottled which causes them to have some colored feathers as adults as well. Was just using them as an illustration. The chick which emerged from the crossing was black which is why Aubrey was stating that there are very few black phoenix here. Of course, I have black phoenix that were not from the import, so it is entirely possible that they could produce black. However, all we have established is that the birds are not recessive white, or at least one of them is not. Thus meaning dom white is in them and they are someone's creation and not your run of the mill white phoenix. My recessive whites and dom whites are also silver duckwing, black, barred, or any other combination under the white so long as on the dom white birds, they have no autosomal red pigment to show, any black and white pattern could be under the dom white. But since the chick was born black, we all assumed it was black or possibly birchen. But we never saw the chick to know by coloration. Blue and charcoal have also been known to be under the dom white since they are just black dilutes.