Sudden gassiness, vomiting, and diarrhea - in the face of no other changes is definitely not related to the food you've been feeding all along.
It means something is wrong with her and she really needs to see a vet ASAP. Bring a stool sample (a recent one) with you so it can be sampled.
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |