should I keep her from him??

My 9 yr old goes to her fathers whenever he remembers he has a daughter.. him and his gf are vegan now they are fruitarians. They don't feed my baby girl nothing but fruits and last time the gf scratched my baby on the hand bc she got some of her dads cherries bc she was still hungry and she said "those are not yours" I have bad anxiety knowing he's gonna pick her up tomorrow.. her dad doesn't love her, I know it.. idk why he's getting her tomorrow. They got a new cat together and they haven't picked her up since then now all of a sudden hes getting her what do I do ;( the gf is a bitch she just acts nice sometimes to be fake.. my nerves are bad