I've read a few posts and whatnot, and I'm sort of tired of hearing this but...
WHAT'S THE DEAL!?
Everywhere I go, it's "amphibians are loaded with parasites" blah blah blah.
So we discourage them as use for food. However, if they SUPPOSEDLY make up the bulk of wild Thamnophis diets, then why don't we use them?
I'm not saying let's all go out and grab some toadies for our snakes, but why not?
The acid in a snake's stomach, although not particularly strong I believe, destroys and decomposes meals, and I once read that 85% of a snake's immune system is in it's gut. Perhaps by depriving them of the occasional amphibian we're also making them weaker. Even though wild snakes have "better" immune systems, they had to develop the resistance somewhere.
Just playing the devil's advocate.
Also, don't bring up the declining amphibian populations junk. This is assuming that the amphibians are provided from a 100% sound environ, legally harvested, etc.