Okay we are back from my vets-he can't find anything apparantly wrong with her either. He put us on....Ranitidine, to calm the stomach down. He re-tested for leukemia and aids, and it came up negative again. Also changed the food to a low-residue gastro food. The other vet didn't suggest any of this . So, if in a week she is still vomiting, we will go ahead and do x-rays and such. So...wish us luck that this does the trick.