Since you don't want your other dog to eat the food, it would be alright to feed her when every one else gets fed and then leave it in her crate with her. It might take a while for her to start eating on her own, but remember don't give in. Even if you give in one time she will think if she holds out long enough you will give in. She will not starve, when she gets hungry enough and realizes you are not giving in she will eat. Good luck and be strong!