Brought home a severely underweight BP baby. Please help me get her back on track

[Bogertophis]

I'm gonna have to keep the bowl trick in mind. Cause yeah, that would fit more with the ball python kind of mentality. I have a fussy girl that like to perch on top of her hide too so that might do well for her....

I had a hatchling BP that had to perch on top of driftwood to pounce on a fuzzy crawling below it for the first feed. And I've used the bowl-trick for various snakes that
need to see some motion but also need to approach & watch it for a while from a "safe distance" first, without the clueless mouse walking right up to the snake & freaking
it out, & without the mouse crawling off to hide somewhere in the substrate. So yes, this is just another trick to keep in mind for any snake that may need "assertiveness
training". It's also a good way to keep the snake from getting a mouth-full of substrate when they're still learning...I've had them do that & then they don't want the
mouse, lol.