My vet reccomends it because it also is really good for preventing the digestion problems that come with big breed dogs.
Your vet is full of what your dog's farts smell like. Dog food is what is causing your boxer's gas. Brutus had the WORST gas, and food allergies, we finally switched him to a raw meat diet (get the book, Dr. Billinghurts "Give your dog a bone", or "Switching to Raw", you can go to BARFdiet.com for more info). A dog's digestive tract is EXACTLY the same as a wolf's. So, in feeding raw, you are actually simulating the natural diet of a wolf because that is what is anatomically correct for your dog to be digesting. My vet reccomends the diet, but there are many vets who do not. By the way, the animals being slaughtered for dog food are condemned animals and consumption of such animals by humans is not permitted by the FDA. So, if Uncle Sam won't let you eat it, why should you feed it to your dog?