sentences:  Also on April 19, U.S. federal officials said that they were investigating reports that Binzhou Futian rice protein had been used in hog feed, but declined to specify where.The California Department of Food and Agriculture placed American Hog Farm in Ceres, California, under quarantine, after melamine was found in the urine of the hogs on the farm.California State Veterinarian Dr. Richard Breitmeyer said "All animals appear healthy," and that "It is unknown if the chemical will be detected in meat."