Very interesting topic!
First, finding the right combination of meat and vitamins would be important as a chicken leg alone wouldn't be sufficient.
Second and more importantly, getting the snake to eat it! I'm sure some snakes that eat almost anything (like my corns for example!) would take it, but I doubt that my BPs would go for that or even my boas!
Third: Personally, I'd rather wait till others have tested such a theory for a long period of time before I would attempt it with my own pets. I breed my own rats so I don't have to worry about the cost, just the pain of cleaning up after them!
Keeper of 5 snakes, leopard geckos, 1 green iguana, 20+ tarantulas, 2 dogs & a bunch of rats!