Well I'd sure listen to Vin Russo for the temps. etc....as I said, I'm not specifically familiar with these, it was just a thought.
Not sure a vet will see anything that you cannot, and that adds more stress, so it wouldn't be something I'd do without obvious reason, like an RI.
So you're not sure she has ever defecated then? am I reading this right? Between being in a small cage & not moving around much (hiding) maybe this is why
she's not eating? In the wild, with a predator (you) lurking about, perhaps her instinct is to wait until it (you) leaves? Again, just a guess... I mean, hiding from
predators & fasting as needed is what snakes do. Maybe she is just way more shy than the male?
I'm just helping you brainstorm, I don't "know" for sure what the answer is...but trying to see it from her perspective.
She needs "assertiveness training", lol...