I have 3 adults, a black sex link, a white brahman, and a buff orpington. Also have a 6week rhode island red, a 4 week buff orpington, and a 3 week barred rock. I am considering getting a roo to make the next generation of dual purpose chickens. Im kinda intrigued by the idea of making mutt chickens. I guess I really only have 4 types of birds and the BSL is already a hybrid, so what would you suggest as a breed for that lucky roo to start my mutt chicken breeding program?