I am puzzled by the emphasis on no other breeds or even colors added. Color crossing within a breed has often been a very useful way to outcross while maintaining breed type and character. Maybe less so with the Orps as history tells us that even our SOP colors were not all derived from the same recipe so to speak. As poultry breeds go the Orpington is a relative new comer and in some ways may still be evolving though of course there are some very stable strains in several colors. Orpington evolution has also meant the development of new and different colors in recent years. The Europeans are way ahead of us and give inspiration to our efforts. But...where do any of us think these colors came from? The beautiful gold laced, partridge and others didn't come out of someone's dreams. Well, they did, but in order to make those dreams a reality there had to be some breed crossing in order to introduce the newer color and then, as has been said in connection with the lavenders, careful breeding and selection for good Orpington type. I believe there was an effort here in the US to create a strain of gold laced using a Wyandotte outcross. Nothing wrong with any of this as it gets the ball rolling. Just trying hard to understand why color or especially breed infusions are looked down on at times and supported at others. Very confusing to this Orpington enthusiast.