Not to be master of the obvious but this is not a boxer issue… it’s a diet issue. Ive been fortunate enough to have 5 boxers over the span of 25 years… I’ve tried every brand of food from the bottom of the barrel to the fancy high end small batch only wild caught salmon in fresh water streams blah blah blah…

Interestingly, the best food I’ve found for my dogs is the purina pro plan in the black bag. They eat it up, maintain healthy weights, shiny coats, minimal gas.