First Yorkie you might want to check this website out. There is alot of information on the net about raw/barf diets. I do worry more about little ones as their system can't handle as much as a large dog. I do feed some of my little ones the Nature's Prairie Raw medallions (2nd link) which is a little different than the pure raw foods that the raw/barf diets talk about.
http://www.njboxers.com/faqs.htm http://www.naturesvariety.com/