A Silkie or Sebright should pass on some other dominant traits that these chicks don't have, and you wouldn't get gold-colored chicks from a Silver Duckwing crossed to a Silver Duckwing, so the d'Uccle must be the father. Porcelain Booted bantam rooster crossed to Silver Duckwing Old English Game bantam hen does make sexlinks. The females cannot inherit silver from their mother, so they only inherit gold from their father and end up that buff-gold color, while the males do inherit silver and end up being yellowish white. I do believe they are all from the same parents as they look like what I would expect from that cross due to the dominance and recessiveness of the parents' traits.