Hi there. I used to work as a ped's nurse. We would give the kids pretty much anything soft right after surgery, we would try to avoid milk based products because it increases mucus which and increase vomiting, but since she is a day or so out- she probably could have ice-cream and pudding and we would avoid anything with red food coloring so that we would know if they were vomiting blood or the food if they happened to do so. I suggest jello, popciles, juice, applesauce, sports drinks, clear soda, mashed potatoes, bananna, scrambled eggs- when she is feeling a little better. She will know when she is hungery and it may seem like she isn't eating at all and that's ok too, she will feel better soon and be back to herself in no time. If it continues call her Dr office and ask what they recommend- as they may have some even better ideas. Might try giving her the pain medication about 20 minutes before you try to get her to eat so that she has that on board to help with the pain.