The decomposing pig carcasses recovered from Shanghai's main river have raised concerns not only about the safety of the drinking water source for the country's largest metropolis, but also about the way pigs are reared.
Despite the city authorities' claim that the river water is safe and there has been no swine epidemic reported upstream, there are still questions that need to be answered, such as where did the carcasses come from and what has happened to cause the death of about 10,000 pigs in such a short space of time?