What's that white pompom doing with those chickens?

You should see the Oreos now.They still pal around with the Silkie mom who raised them, but they both tower over her. The size differential is quite amusing.  Even though they´re not full grown, they´re getting quite magnificent.  Slate on black feathers with hints of emerald green, and both of them developed copper in their neck feathers.They´re supposed to be Ameracuanas, but I think some Copper Maran got in that mix.  Will the eggs be blue or brown?One looks like a rooster, with a little pink of comb coming in.