 This wasn't the only new use of laser technology last year. Detection of fecal residue on poultry carcasses by laser imaging. See, in slaughter plants, birds are gutted by a metal hook that often rips the intestines. So, commonly the skin on chicken gets contaminated by these ruptures of the digestive tract during the evisceration process, which can expel what they call internal content. Internal content that can be picked up by laser scanning. So, what percentage of retail chicken carcasses are contaminated with fecal matter? 92%. 9 chickens out of 10. At least with pigs and cows, we don't eat the outside of them. But that's one of the problems with eating chickens and fish. By eating the animal's skin itself, we're more likely to be exposed to fecal bacteria. Don't try this at home.