Yea the only thing I would trust is Flagyl. Pythons are notorious for going on strikes....unless it has been a LONG time or the snake is not looking / sounding well then just keep on trying.
Michelle
Lets just say it has advanced to ....way too much to list
"Metronidazole eliminates bacteria and other microorganisms that cause infections of the reproductive system, gastrointestinal tract, skin, vagina, and other areas of the body. "
Main use in reptiles is to destroy the parasitic bacteria in the snakes gut so it can hold down food and in turn increases appetite.