I have a pen with a mottled roo (too much white) and some mottled hens and some barred hens. I should have gotten mottled from the mottled, and from the barred I should have gotten sex link barred cockerels and black hens. I have a whole bunch of yellow chicks with very distinct one or two black marks on the head. Any guesses what color these will be? Any guesses where they came from?