Find a fish kibble with just one carb, I always pick brown rice as potatoes peas etc are too starchy & can cause yeast… if she is use to a topper on her kibble put some tin salmon or sardines or pick a novel protein meat that she has never eaten before to add with her kibble….remember less is best especially in the beginning, I’d stick with a raw diet as it has no carbs you watch her skin & itch all clear up on raw… 1 novel protein Rabbit Kangaroo etc Lew Olson has a F/B group called K9 Nutrition & can help with the raw diet…
