Excessive amounts of antibiotics were found in eight batches of raw chicken samples from KFC supplier Shandong Liuhe Group from 2010 to 2011.
Investigate into KFC supplier
Shanghai checks KFC chicken
The Shandong provincial government is investigating chicken farms supplying KFC, on accusations of illegal use of antibiotics and hormones.
Check: Shanghai food watchdog checks KFC chicken
Sales: Tainted chicken scare hits Yum China sales
Shanghai's municipal food safety administration is testing samples of raw chicken supplied to KFC over concerns about excessive antibiotics.
A slowdown in China's economy is not the only strain on Kentucky Fried Chicken's business in the country, where competition is getting tougher.
Chicken meat samples sent by a Chinese supplier to US fast-food chain KFC meet the national standard after testing, local authorities said.
Food safety has become a controversial issue in China, both for consumers and food makers. Food companies in China and abroad have stepped up their efforts to guarantee quality, especially with regard to identifying its source.
Consumers more aware of their rights but overreaction can also be a problem.
KFC Corp, the largest foreign fast-food chain in China, said it will accelerate its expansion in smaller cities despite the global economic slowdown.
Yum! Brands Inc has opened its 300th Kentucky Fried Chicken franchise in Beijing, 25 years after entering the Chinese mainland market.
Yum Brands Inc has closed one of its East Dawning restaurants in Beijing.
McDonald's started its biggest ever recruitment plan in China on Sunday, hoping to meet its ambitious expansion goals in company's third-largest market
McDonald's Corp has raised the prices of some set menu items for the second time this year in China to offset higher operating costs.
The fast-food giant Yum! will open KFC and Pizza Hut restaurants inside stores operated by one of the largest electrical appliance retailers in China.
Fiona Yao, a 32-year-old accountant, passed up a bowl of steaming noodle soup in favor of spicy chicken wings and a burger for lunch from a Kentucky Fried Chicken outlet in a Shanghai shopping mall.
McDonald's China made an apology through its official micro blog only about one hour after China Central Television (CCTV) exposed illegal operations in one of its Beijing branches on Thursday night.
Many Shanghai consumers have become used to seeing frequent increases in food and beverage prices.
Branches of KFC in China denied the so-called "handsome delivery boy service" widely discussed on the Internet.
The US giant is facing a plethora of Chinese and Asian eatery chains that are steadily munching away at its market share.
Food-safety rumors have a butterfly effect in China's cyberspace, and when it comes to international fast food giants in recent days, the effect seems to be magnified.
Standards for customer relations in China seem to be lower when compared to western developed countries.