KFC supplier used excessive additives in chicken feed

The administration's probe revealed that the logistics center's purchase records suggest that no purchases were made from Liuhe after May.

"We will investigate whether Yum Brands took measures according to the food safety laws when they received the report on unqualified chicken," said Gu Zhenhua, deputy director of the Shanghai Food Safety Office.

"Further investigations will also be made on the tests body (Shanghai Institute for Food and Drug Control), and we will implement the most strict accountability procedures on it," he said.

Toxicologist Lu Dun said that the incident exposed some flaws in the system. "For the testing body, it's hard to find out how the clients will deal with the chickens after the test results are unveiled," Lu said.