I agree I read that they can fast for months as long as they don't lose more than 15% body weight but at that age she should be a pig indeed.
Go for live food. Don't worry fuzzy terroris just a myth lol
My ball female is in a glass tank outdoors and the cold doesn't phase her for food at all. But she is picky about where she is fed
with that in mind where do you feed her? In her tub?