I have 24 mutt eggs in the incubator right now, end of day 6. They are, I believe, red sex links hens and RIR rooster. I am hoping to start a flock of BLR Wyandottes for next year, we will see. I can tell you this, my hens lay some "BIG" eggs, and I am not real sure how the Wyandotte's will measure up. I am concerned I may be spoiled to these huge eggs. I got a couple dozen from a friend, and the seemed soo small in comparison. I had to eat twice as many of his eggs. Most pure breeds were actually cross breeds at one time, this is the same way with dogs, what is now considered a pure bred, was very possibly a cross breed when it originated.