For those who would like to consider raw and natural diet for your dog, following is a link to an informative site.  The author gives some good advice on raw diets.  Dr. Becker also advertises her book, but her site gives out a lot of information and sources.  It is a good read.
http://healthypets.mercola.com/sites/healthypets/archive/2011/03/17/prey-model-diet-sparks-online-demand-for-wild-game.aspx

I have raw fed my dogs for about 8 years.  I did a lot of reading and research before I started.  I use the modified prey-model diet and I supplement with grain-free (the ONLY kind for raw feeders) kibble.  I also supplement with pro-biotics and fish oil.