frog hormones?

[Diver]

By 'expert' you must mean greedy business men types who put money first and the animal's welfare second. Apart from sticking needles in, such people also squeeze the eggs and sperm out of frogs often causing internal injuries and prolapses. But hey, it's all about the money right?

On the other hand there are also people who actually care about frogs and breed them naturally or not at all. Which species do you have?