Dr. Weiss is a Professor of Dairy Cattle Nutrition in the Department of Animal Sciences at The Ohio State University, located at OARDC in Wooster. He earned his BS and MS degrees from Purdue University and his Ph.D. from Ohio State. After a short stint as Assistant Professor at North Dakota State University, he has been on the faculty of Ohio State since 1988 with a joint research:extension appointment. His main research areas currently are: 1) importance of variation in cow and diet factors in diet formulation; 2) factors affecting digestibility in dairy cows; 3) nutrition of pre and early post partum dairy cow; and 4) relationships between minerals and vitamins and health of dairy cows. He has authored more than 125 journal articles and more than 350 popular press and proceedings articles and has given invited talks in 40 states and 29 countries.