Chances are, a dog fed only commercial food is not really healthy. I can't see that there would be any problem. In my experience the dogs seem to take right to this diet. A dog or cat's digestive tract is much shorter than ours and the meat and bone just pass right through without causing any problems. Some people may want to go slower though, every dog is different.
Some people are concerned with bones causing a blockage.
The bones we feed come out as a white powder. They also have very little odor. Cooked bones can splinter and cause terrible damage to a dog. Teeth - you won't believe what this diet does for an animal's teeth. All of our dogs teeth look great, but his are like none I've ever seen.