All I can say is that I myself and a couple people with deep pockets and big names in the herp industry attempted to create frogs that rivaled Nuance's, spending several hundred thousands of dollars in research on Cranwelli eggs and to no avail. Just look at the herp industry, the more the animals are line bred over several generations the more crazy things happen. That would also explain the smaller spawnings! There has to be several scientific papers scattered across the internet that support the idea of eventual sterility from mass produced linear generations. Oh yeah, Scaleless bearded dragons anyone??? lol!