Pigs in a research barn squealed with every step they took, their movements accompanied by intense pain and discomfort. A pork producer opened his transport truck to find 10 to 12 pigs dead after each journey. And in one slaughterhouse, documented by animal behavior expert Dr. Temple Grandin, "the pigs were so weak they couldn't walk. They had five or six people just dedicated to handling the lame pigs."
All of these incidents were "adverse events" suffered by pigs after they were fed ractopamine, a rampantly used growth-promoting drug that has triggered more reported incidents of negative side effects – more than 160,000 and counting – than any other animal drug on the market. Banned in the European Union, Russia and China – which is, in itself, telling, given that the latter two nations are not known for rigor in food safety – the Food and Drug Administration (FDA) approved ractopamine for use in pigs after reviewing only one questionable study on the direct effect of its exposure to humans. Consistent with human health concerns, ractopamine residues have, nevertheless, been found in one in five samples of fresh pork in supermarkets, according to the magazine Consumer Reports. Despite these deeply troubling statistics, ractopamine is fed to a majority of American pigs, as well as cows and turkeys, to spur rapid lean muscle growth.