I came across this very interesting article, the first in a series of 12 that you can subscribe to receive for free. It gives a detailed overview of how the pet food industry came to be in the past 50 years or so.
I am looking forward to the rest in the series as I like to feed home prepared food with the occassional supplementation of kibble. I like offering raw and home cooked diets and this series looks like it will have plenty of good info for those thinking about feeding in this way, or wanting more ideas if you already feed raw/home cooked. Or if you just want to learn more about dog/cat nutrition.