Yaj - I don't feel the risk of Bloat/Torsion is worth the possible B -Vitamin & flea control bennifit. I believe if a balanced diet is feed there should be no need to suppliment. Concentrated suppliments are a relativily modern concept. Man and beast had lived for thousands of years before the bennifit of the Vitamin pill.....;) This is a nice overview of RAW food: http://www.barfworld.com/html/barf_diet/barfdiet_specific.shtml Organ meat and a variety of veggies /fruit added to a meaty bone diet will/should be all that is ever needed.