Dead pigs are strewn along the riverbanks in the Songjiang district of Shanghai on Thursday, March 7, 2013. Chinese officials say they have fished out 900 dead pigs from the river, which is a water source for residents. (AP Photo)

Dead pigs are strewn along the riverbanks in the Songjiang district of Shanghai on Thursday, March 7, 2013. Chinese officials say they have fished out 900 dead pigs from the river, which is a water source for residents. (AP Photo)