The Nazis were looking into that over 70 years ago, princess. You'll still find those same disturbing eugenic rants from a number of Internet forums even today, in this supposed age of enlightenment and tolerance.
Read about super muscular test tube dogs in China.
Yowza. I think I saw him in an episode of
Batman Beyond. You know, this sort of selective breeding is what makes dogs physiologically susceptible to genetic defects, such as blindness, deafness, joint problems, hip dysplasia, and overly aggressive behavior.
And now, to take it to the other extreme:
Woman thinks she is cat trapped in human bodyWhere did we get all these people who hate themselves and want to be another gender, race, even species?