If I have (for example) Jersey Giants, in Black, Blue, Splash, and maybe even white.... Can I breed them all in the same pen, and they are still "pure Jersey Giants?" Or, do you divide them up, by colors, for breeding purposes? Same question with Marans (not Cuckoo Marans), ie: Black Copper Marans, Blue, Splash, Birchen. Do they all need to be bred only to their specific color of breed? And Silkies, the same question .... separate by color, for breeding? Thanks!