They provide quality protein, fats, fat soluable vitamins and cartilage. Perhaps there is a very small percentage of risk, however, dogs have evolved to eat bones and it would be rare that a problem might arise. If fed raw, they are soft and chewable. It is NOT recommended that cooked bones be fed as they become brittle and have the potential to splinter. An all meat diet has the potential for disaster, however a meal of pure meat is fine now and again.
Fish can also form a small part of the balanced diet.
If a lot of fish is to be fed, then the whole fish must be used and vitamin E should be supplemented. Sardines are recommended on a regular basis, mixed with other foods, as it supplys the omega 3 fatty acids. Offal Organ meats are a small part of the BARF diet. The use of vegetables must be stressed as their omission in the diet may contribute to ill health. The wider the variety the better, as each contributes to a full spectrum of nutrients.