As American food safety regulators head to China to investigate how a chemical made from coal found its way into pet food that killed dogs and cats in the United States, workers in this heavily polluted northern city openly admit that the substance is routinely added to animal feed as a fake protein.

For years, producers of animal feed all over China have secretly supplemented their feed with the substance, called melamine, a cheap additive that looks like protein in tests, even though it does not provide any nutritional benefits, according to melamine scrap traders and agricultural workers here.

Few people outside the agriculture business know about the use of melamine scrap. The Chinese news media — which is strictly censored — has not reported much about the country’s ties to the pet food recall in the United States. And few in agriculture here do not see any harm in using melamine in small doses; they simply see it as cheating a little on protein, not harming animals or pets.

As for the sale of melamine scrap, it is increasingly popular as a fake ingredient in feed, traders and workers here say.

Read (New York Times)