I hatched some barnyard mix eggs from my white Cochin, Papaya. I know the rooster that fathered the eggs was my buff Silkie (my only rooster, but there were two others about two weeks before the eggs were collected, one did have some blue leakage) because they have black skin and five toes. I am wondering how this cross could have resulted in blue-looking chicks. The rooster is in my profile picture, I attached pictures of the hen and the chicks. Thank you.