I would suggest asking the previous owner what they were feeding her. Second, I would leave her alone for two weeks to calm down from a lot of the stress from the initial move into your home and from moving each time for attempted feedings. Then just try a pre killed rat/ mouse and lay it on the warm side of her tub, do not remove her, and she will find it. If she still refuses after an hour or so, remove it from her tub and try once a week with a new rat. Just keep in mind, there is no need to force feed, they don't get to 950 grams from not eating.