Here's a clip a friend of mine emailed to me so I figured I would pass it along. Some interesting info in it to say the least. Don't know about the book they are trying to sell at the end and I didn't check out the link at the bottom of the clip but the majority of the info on the clip might be of interest to some.

http://www.thedogfoodconspiracy.com/v/a/fk.html