IMO, your vet isn't someone that deals with large numbers of ball pythons. He sounds to me like he is repeating things taught to him in school. Not that there's anything wrong with that at all, but if you'd like another opinon from someone far less educated, he it goes ....

CH ball pythons are NEVER "thoroughly checked". That is entirely incorrect. I've been around the industry long enough to say that with great confidence. They are sold, bagged, and shipped .... sold, bagged, and shipped ... over and over. That chances of them picking up a parasite through transferrance along the way is certainly possible.

And for me, one regurg is one too many for a baby ball python. I produce dozens every year and never see regurgs. It's just not something that is common. On the rare times I have seen them, 99% of the time, either temps or parasites are the cause.

The pedialite will be fine if you're just going to add it to the drinking water, but tubbing or administering it manually would be way too stressful if you ask me.

Get the fecal done (ask if he's sending it out or doing it in house) and see what he says .... I'd still wait a week to 10 days before offering food.

I would certainly feel no rush in getting food into your snake ... I've had hatchlings go as much as 16 weeks before taking their first meal. Unless there is an underlying illness, time is on your side.

What are your temps again?

-adam