I don't think repeated fasting is a good idea, generally if one does fast a dog (which not all raw feeders do) it's only 1 day a week max. I would be concerned with her starting to full out refuse all food, since she's getting used to not eating.
Have you tried adding small bits of raw meat to the canned food? Tricking her into eating it all together? Don't feed raw & kibble (esp w/grains) at the same time though not good for the digestion.
What about while you are cooking for yourself & just "accidentally" drop a piece of meat on the floor. Alot of dogs & cats fall for that cuz it's "not for them"
Will she eat cooked meat? You could try transitioning to homecooked first then on to raw.