Consumers should immediately stop using any of the Kirkland Signature or Nature's Domain dry pet food products identified above, and return them to their local Costco for a full refund. Consumers are advised to always wash hands thoroughly with soap and water after feeding, handling or cleaning up after pets. Clean surfaces that come into contact with pet food or ill pets. For more information, consumers may contact Diamond Pet Foods at 1-866-918-8756, Monday through Sunday between 8 AM to 6 PM EST, or visit Diamond Pet Foods' website . Assistance is available in both English and French. Date modified: 2012-05-18