U.S. Assures Consumers of Pork Safety in Pet Food Recall

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"Many companies buy melamine scrap to make animal feed, such as fish feed," Ji Denghui, general manager of the Fujian Sanming Dinghui Chemical Company, which sells melamine, told the Times. "I don't know if there's a regulation on it. Probably not. No law or regulation says 'don't do it,' so everyone's doing it. The laws in China are like that, aren't they? If there's no accident, there won't be any regulation."

On Thursday, China banned melamine from its food products, but rejected the charge that the substance caused the U.S. pet deaths, the Associated Press reported.

It's not clear why melamine became so fatal in pet food, because it's not believed to be particularly toxic. But U.S. law bans its presence in any form of food, the newspaper said.

The rice protein was imported to the United States by Wilbur-Ellis, an agricultural product importer and distributor. The FDA said it is continuing its investigation of the source of the adulterated pet food, including "tracing products distributed since August 2006 by Wilbur-Ellis throughout the distribution chain."

In their latest statement, the FDA and the USDA said that, as of April 26, they had identified sites in six states where contaminated pet food was received and used in feed given to hogs: California, Kansas, New York, North Carolina, South Carolina and Utah.

On Friday, FDA officials searched the facilities of a pet food manufacturer and one of its suppliers in the continuing probe of the contamination, the AP reported.

The officials searched an Emporia, Kan., pet food plant operated by Menu Foods and the Las Vegas offices of ChemNutra Inc., the news service said, citing information supplied by the companies.

Menu Foods made many of the major brands of dog and cat foods that were recalled because of the melamine-contaminated wheat gluten. ChemNutra supplied Menu Foods with the wheat gluten, which was also imported from China but reportedly from a different supplier than the rice protein.

Both companies said they were cooperating with the investigation, the AP said.