Yes. Go back to soaking the food. Also, try dropping the quantity at each meal for a little while to see if that will get her back in the swing of things. Often, the better the quality of food, the less that needs to be fed - it is more concentrated nutrition. What does the packet say about quantity?
Also try dropping her to 3 feeds a day. She's about the right age for that anyway. Go to breakfast, lunch and supper.