Researchers use laser imaging to determine the proportion of retail chicken contaminated with fecal matter.
Check out these videos to learn more about the contamination of food from slaughter plants here:
Superbugs in Conventional vs. Organic Chicken
Yersinia in Pork
Ractopamine in Pork
Salmonella in Chicken & Turkey: Deadly But Not Illegal
MRSA Superbugs in Meat
And check out my other videos on chicken.
Also see my associated blog post: Why is it Legal to Sell Unsafe Meat?