I'm just going to jump in here very late and say that blue is a color that hardly ever occurs in nature. This is why "naturose" and products of the same type that enhance color simply don't help blue. How many animals besides dart frogs can you think of that are naturally blue? Probably only a few lizard species, with males in breeding coloration, that's it. Blue is a color that is not on the natural pigmentation scale in almost every case.
Do I think "samurai blues" are genetically altered? Probably not. However, horned frogs produce so many offspring that it is too easy to go and pick through for unusual colors. That is why samurai frogs have a lower yield. In order to get a blue frog, you have to significantly lower the gene pool by breeding only blue frogs together, therefore creating a genetically weaker frog. This is the same reason why "mutt" dogs are usually healthier than purebreeds; they have a much richer set of genetic variety to work with.






