Sunday, April 29, 2007 WASHINGTON - Federal agents searched facilities of a dog and cat food manufacturer and one of its suppliers as part of an investigation into the widening recall of pet products, the companies disclosed Friday.

Food and Drug Administration officials searched an Emporia, Kan., pet food plant operated by Menu Foods and the Las Vegas offices of ChemNutra Inc., according to the companies.

Menu Foods made many of the more than 100 brands of pet food recalled since March 16 because of contamination by the chemical melamine. ChemNutra supplied the manufacturer with wheat gluten, one of the two ingredients tainted by melamine used in recalled pet products. Both companies said they were cooperating with the investigation.

Menu Foods also said the U.S. Attorney's offices in Kansas and the western district of Missouri have targeted the company as part of misdemeanor investigations into whether it violated the federal Food, Drug & Cosmetic Act. The sale of adulterated food is a misdemeanor.

Import records obtained by The Associated Press show that since May 2006 alone ChemNutra also imported 440,000 pounds of the second suspect pet food ingredient, rice protein concentrate, from the same Chinese trading agent that handled exports of the tainted wheat gluten.

The origin within China of the wheat gluten and rice protein concentrate remains murky.
Meanwhile, rice protein concentrate imported by the second company, Wilbur-Ellis Co., has tested positive for melamine. It came from a different Chinese source, Futian Biology Technology Co. Ltd.