I know that the blue egg gene is dominate and I know how genetic work. From what I understand, the green eggs come from blue+brown egg genetics according to another BYC thread. However, this was only mentioned in passing and I want to dog deeper because I currently have a flock full of English Orpingtons and want to add a few EE's and see where this blue egg gene takes me. I have a black (with a chocolate gene!) Orpington roo. If I cross him with a blue egg layer, will I ALWAYS get green eggs(instead of blue) or is there a chance of blue eggs? Also, if I get only green eggs, can these chicks be bred out to eventually produce blue? If so, how many generations would that take? Does brown+blue always = green? Thanks!!