Go figure, was waiting for a doctor advocate to pop in. Not every vet is knowledgeable with reptiles. Theres more bad than good who are more willing ot make a quick buck rather run tests to find the problem.
And yes the Shots for Fortaz is completely unnecessary. The B-12 shot does no harm what so ever and flagyl wont harm snake either.
Before you come criticizing some very reputable people think twice before posting.