What is the best cat food for a cat with stomache problems?

I have a young female cat that has a very sensitive stomach, so it is hard to find a consistent cat food that she will eat. She will try all the brands I have gotten, but if she throws it up she wont eat it any more. She has no trouble with wet food though, but I have 4 other cats and would like to keep the kinds of food I get to 2 kinds(dry that is), that I can keep out all day and I know that they will all be able to eat it.