As of now, there aren't many do to the large amount of animals that founded the captive breeding population. They do bring in fresh blood, with the rate we are breeding morphs, and inbreeding them, that might possibly help with outcrossing. Other than that, not many. You can get the same from captive hatched animals. Its not nearly as detrimental, and it supplies fresh blood. It just takes longer for them to be raised for breeding.