Not me! I leave all that to the genetics people. I just hatch 'em and leave all the complicated stuff to Aubrey and others who know way more than I do. I learn just enough to deal with what I have; for example, I know how the Mille Fleur and Porcelain work together. I know how blue/black/splash works for my BBS Rocks and Orps and I know how the barring gene works for my Barred Rocks and making Barred EEs by crossing BR over EE or Ameraucana. Beyond that, I'm genetics-challenged!