i know this thread is quite old, but I just wanted to add that if you have a dog that seems to suffer from itchy or dry skin, constant stomach upsets or dirty ears, it could well be an intolerance to wheat. I have a dog with an intolerance,and she has been on raw food since she was 11 weeks old. She is so much happier on raw, and it's so easy to feed. I also feed two of my other dogs raw food and they have much better health since being on raw. Shinier coats and overall health.
and, just in case it hasn't been mentioned, the book "Real Food for Dogs and Cats" is also a very good book to get your hands on if you are interested in raw feeding.