[AussieAirlie]

I have a 2 year old Aussie that has struggled with bouts of diarrhea anytime she has a slight change in diet. Her food has remained the same since she was 1 but new treats or even drinking different water has caused her to have loose stool. My vet has recommended that we try Iams Veterinary formula Low Residue food. Is this a good quality food or does the vet just make more money by selling me this food? Dogfoodanalysis.com rates this vet formula 1 star where as the food she was eating before was a 4 star food.