Getting her to eat is the main thing, and that weight loss is a big concern. Babies her size should be eating, alot.

Do you have a way to get live mice? You can always switch her back over later, but getting her eating is your main priority. She can't really afford to lose weight.

I know it's easier having her in a 15qt tub, but she probably feels exposed in there. Try the smaller tub, they can easily thermoregulate just by getting on top of their hide or going next to the water bowl. I know Adam most likely had her in a 6qt baby rack. I've never used the Zilla hides, so I can't comment on those. I've had wonderful luck with the clay and plastic planter saucers. They are round and low to the ground, and the snakes just really take to them.