Located in Sioux City, Iowa, Darling International Inc. is one of the leading providers of rendering, recycling and recovery solutions to the food industry in the United States. The company collects inedible byproducts from the food processing chain and recycles it into fat, protein and hide products used by commercial manufacturers worldwide. Its restaurant services include cooking oil removal, used oil storage systems and grease trap service. The firm s product line includes a range of animal protein meals, fats, oils, hides and specialty pet food. Additionally, Darling International Inc. operates a national service center that offers national service, service management and online records management services.