Did you taker her to the vet and what did he say== first start with the food are you feeding it dry or canned and how much and how often dont free feed her start feeding her a couple times a day and only small portions like a a 1/4 0r 1/3 of can twice twice a day [ it would give them a chance to digest their food ]===cats have a tendancy to eat everything they can wheather they can hold it or not ===do same thing if using dry === there is a posibility that her food does not agree with her ask vet about a more digestable food for cats ===she also needs to be checked for hair balls



