Be careful with the amount of food switching you do, that can affect the tiny digestive system as well. And if she is having digestive problems you want to make sure she stays hydrated. My daughter has some problems with her Japanese Chin with regards to foods that sit well with him and the person at the holistic pet food store told her that she needs to keep him on one food for 2 months before switching so that his stomach does not become too compromised. Good luck!!