Question:
http://abclocal.go.com/wjrt/news/051..._pet_food.html
It's too long to copy over in its entirety, so here's the first few paragraphs:
Undated — (05/10/04) Plump whole chickens, choice cuts of beef, fresh grains, and all the wholesome nutrition your dog or cat will ever need.
These are the images pet food manufacturers promulgate through the media and advertising. This is what the $11 billion per year U.S. pet food industry wants consumers to believe they are buying when they purchase their products.
This report explores the differences between what consumers think they are buying and what they are actually getting. It focuses in very general terms on the most visible name brands -- the pet food labels that are mass-distributed to supermarkets and discount stores -- but there are many highly respected brands that may be guilty of the same offenses.
What most consumers don't know is that the pet food industry is an extension of the human food and agriculture industries. Pet food provides a market for slaughterhouse offal, grains considered "unfit for human consumption," and similar waste products to be turned into profit. This waste includes intestines, udders, esophagi, and possibly diseased and cancerous animal parts.


Answer:
There's tons of information on this out there on the internet. There are also great books on it, one book is 'Food Pets Die for: Shocking Facts about Pet Food'
by Michael W. Fox (Foreword), Ann N. Martin (Author).


Answer:
That article is one of the best that I have seen and is probably one of the most cited internet articles when it comes to pet food. The API (the organization that published the article) has a very informative website as well.
http://www.api4animals.org/


Answer:
What a shame so many people get angry when you tell them/show them this- angry @ the people sharing the info, not angry that there is so much hazardous pet food on the market.