I'm undecided. I think there would be pros and cons just like anything else. I'm leaning towards the "Yes its wrong" just because tampering with nature is never good, especially if you just want a unique pet.
If humans didn't tamper with "mother nature", then we would have no pets or technology. If we leave things up to "mother nature", why do you assume we would be better off? Chance-filled Mother Nature doesn't look out for us or any other species for that matter.
~ 1.0.0 Python regius ~ Wild-type ~
~ 1.0.0 Canisfamiliaris ~ Blue Italian Greyhound ~
~ 0.0.9 Danio rerio~ Wild-type and Glofish