I worked at a clinic in Texas that carried it along with the Veterinary Prescription Wysong diets and we had great success with it. It was a good food. Will it agree with a Boxers belly....hmmmmm.....who knows, but that is a shot on any food. My Great Dane used to eat the Senior and did well on it. It does have corn in some of the lines and there is one that is high protien....Check out the web site and compare.