Selective breeding is what separates the make a buck crowd from those that are in it to produce awesome animals. Just because something does not fall into the genetic classifications of recessive, dominate, and co-dominate does not mean it doesn't have some kind of effect on the offspring. The easiest way to produce amazing animals is to start with amazing animals. If that isn't an option you may have to breed for several years holding back the best stuff to get in right in the end.