The recall for Diamond Pet Food products has been expanded eight times to include a variety of pet food products, leaving some safety advocates wondering how far the potential salmonella contamination extends. The most recent expansion was announced on May 18 to encompass the Diamond Naturals Small Breed Lamb & Rice formula dry kibble after more consumers reported pets being made ill by salmonella tainted pet food. The latest expansion marked the first recall of pet food products manufactured at the Diamond Pet Food plant in Meta, Missouri. All previous recalls affected products made at the Gaston, South Carolina production facility. The other Diamond Pet Food manufacturing plant is located in Lathrop, California, but currently, no recall has been issued affecting products made at this location. The results of any investigation into the cause of salmonella emanating from two separate manufacturing facilities have not been made public as of yet. The somewhat uncommon strain of the organism, salmonella infantis, is the focus of the recalls issued for products produced at the Meta, Missouri facility, but the precise strand of the contaminant at the center of the most recent recall for products manufactured at the Gaston, South Carolina plant has not been announced. Neither the United States Food Department of Agriculture nor the Missouri Department of Agriculture has currently issued a statement to the press providing any further information beyond that offered in the most recent recall expansion notice issued May 18.