Take it as a warning..

File under 'headlines you really don't want to see.'

6,000 Disease-Ridden Dead Pigs Found Clogging a River in Shanghai

"(S)ince the government arrested some tainted meat dealers, nobody comes to buy the stuff anymore. So it's normal that there are so many dead pigs in the river."

Although the Chinese authorities assure customers their water quality is unaffected:

6,000 Dead Pigs in River Not Affecting Shanghai's Water, Officials Insist

Concern is naturally being raised over water quality but anytime you get thousands of dead animals there's also the opportunity to ask why and to ask what warning signs we should be taking from this.

Or we could just redefine 'normal' to include thousands of dead pigs in a river