It's called neoteny. http://en.wikipedia.org/wiki/Neoteny http://en.wikipedia.org/wiki/Neoteny So we've already been doing this for thousands of years. >Some

It's called neoteny. http://en.wikipedia.org/wiki/Neoteny http://en.wikipedia.org/wiki/Neoteny So we've already been doing this for thousands of years. >Some common neotenous physical traits in domesticated animals (mainly dogs, pigs, ferrets, cats, and even foxes) include: floppy ears, changes in reproductive cycle, curly tails, piebald coloration, fewer or shortened vertebra, large eyes, rounded forehead, large ears, and shortened muzzle.