OK so I have several types of pure breed chickens. However, I have several cross-chicks are hatching now. I know for sure I have one GLW/Partridge Cochin Cross. And One Buff Polish looks pure. But the new one that just hatched I am not sure if it is a Partridge Cochin/Buff Polish cross or if it is a PartridgeCochin/Black Sumatra Cross. The chick has feather legs so I know the cochin is her dad, but she is all white with a black spot on her back. I am thinking her mom is the Sumatra, but not sure. Does Black and Partridge give off white with black spot She does not have the skull of a polish does anyone know color phenotypes?????