That's the answer.
A chicken with two copies of the recessive white gene will look white, but it still has all the other color genes a chicken would normally have. So it's genetically gold or silver (but you cannot tell which.) And it is genetically chocolate or not-chocolate (but you cannot...
I'm a bit late in seeing this thread, but here's a bit of answer that wasn't given yet:
A chick with a dominant trait must have at least one parent who has that same trait.
Dominant traits, and what it means about parentage with your chicks:
--5 toes (silkie parent)
--crest (silkie parent)...