You sure it's a silkie x d'uccle? It has no hint of d'uccle, plus it's got silkie feathering...if it did have a d'uccle parent, it wasn't pure since it was carrying the silkie gene. It's prolly just a sg x silkie. Very cute though.
Yes - am pretty sure - I think that is where the white tufts coming out of the sides of its head are from. It's right where the d'uccle beard would start. Plus it is blue and red - all of my cochins are blue, my silkies are blue, and they have been mostly infertile so far. The d'uccles are the only laying birds I have that would have that color. But I make no gaurantees. It was just an educated guess.