I hatched out some silkies back in July (I think). They were supposed to be splash, so either the eggs got mixed up or the whites came out of the splash pen. 2 pullets 1 cockerel. 1 of the pullets has a couple yellow feathers on her chest. There was more, but it looks like the color is maybe molting out. What could this be from? And if the yellow doesn't dissappear is it okay to still breed her? Thanks.