Since she's doing well on it & also on a rotation diet, I don't see why you need to stop giving it to her (unless she get's tired of it). She is getting enough protein from her raw food.
Mine hate teeth brushing lol! It's a wrestling match w/one & Princess girl makes these sad moaning sounds, I feel so bad for her. But it must be done...if you pull back her lip/mouth from the side (kinda like you want her to make a joker smile), it will expose her back molars. She'll hate it at first, but she'll get used to it.