The Cream legbar does have some of this blood in them. According to The Autosexing website they have the ameraucana blood in them.
Never heard of a blue egg laying Dorking. They would just about have to have some somewhere I would think. Is there another country that have had green or blue...
From all that I have read and understand there were orginally two types of blue egg ;laying breeds imported from South America (Chile). I believe that the current Easter Eggers, Ameraucana, and Araucana were all developed from these two types.
That's one reason that it really gets me that...