Just because your dog has successfully eaten a diet for 3 years doesn't mean it cannot now be adversely affecting her. Something is making her spit up, eat grass and get sick from an empty tummy prior to antibiotics, even if it is just once a month. It could be excess stomach acid from something creating it - possibly her current diet. Dogs often live with empty tummies for long periods of time without nausea or symptoms other than hunger. I don't think an empty tummy causing white gums and nausea until you get applesauce in it is normal and would see if the vet wants to think about changing something about the diet and/or run some tests on her if she is still having the problems she was having prior to the antibiotics.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |