The photos have copyright, so I can't copy them !
But when you look the link :
www.ilpollaiodelre.com/polliIt3.htm you can see them.
The hen indeed look a liitle as with black dots, but look also the cocks coloration.
When now you can imagine this coloration on "Silkie-feathers" this could explain they are "similar" !
I just wanted to know if you have information on the genetic-code of these Robusta Maculata coloration ?