The hen is columbian patterned, the black feathering is only on the neck and tail. Dominant white crosses have random 'flecks' of black. The hen has the right genes for producing red sexlinks. It's the rooster that is the problem. He is likely the same color genetically as a 'Black Copper' or 'Brown Red'. That basically means he's red/gold base color, but birchen patterning. The birchen pattern produces black chicks. You won't be able to sex the black chick until it starts to feather in. The yellow chick is probably male.
