I could be wrong, but I've heard with picky eaters it isn't wise to switch their foods a lot because that's what causes them to be picky? IF that's the case, just stick her on one food, leave it out... a healthy cat will not allow itself to starve, so she WILL eat it. Until then I suggest still trying to find some healthy additive to add that she likes.

If you're mixing small amounts of baby food to her kibble, and she likes it, I don't see it as being a huge concern since she is still getting the necessary nutrients (taurine, etc) from the kibble.