Seven people in China were recently arrested for allegedly injecting dirty pond water into meat to increase its weight and so boost its price.
Up to 6kg of bacteria-ridden water was injected into sheep carcass before being sold to markets, food stalls and restaurants, reported China Central Television.
According to Reuters, police raided an illegal abattoir in Guangdong in late December and found 30 such carcasses, 335 live sheep, forged inspection stamps and equipment to inject water into the mutton.
In another food scandal, Walmart recalled donkey meat snacks from some of its stores in China after fox meat was found in the product.
According to a 2013 Pew Research Centre report, close to 40% of Chinese think food safety is a "very big problem".