"The 'bring it on, the more information the better' attitude we have about genetic testing could really come back to bite us, " says Ellen Matloff, director of cancer genetic counseling at the Yale Cancer Center.

CNN: Should I test my breasts?

"Testing each pig costs more than 100 million yuan a year, but it shows a more responsible attitude to the health of our consumers, " Mr. Wan told the newspaper.

WSJ: 'China's No. 1 Butcher' Turns to U.S.