ARPAS will sponsor a symposium entitled “Nutrition Models—Where Are We Going In the Next Decade” at the 2010 ADSA-ASAS meetings held in July 2010 in Denver, Colorado. Dairy and beef models are used every day in the feed manufacturing industry, nutrition business, and research. Significant progress has been made with research in several of these areas since the NRC’s Nutrient Requirements for Beef Cattle (1996) and Nutrient Requirements for Dairy Cattle (2001) were released.