Research, that demonstrates biological principles for producers, stems from previous basic research that was intent on discovering these principles. The basic research, at the Sheep Unit, will be conducted within the confines of the Lambing Barn. Surgically modified animals, individually-fed lambs, pen-fed lambs, and individual ewes (and suckling lambs) will be used to develop basic principles of diet utilization for maintenance, reproduction, lactation, and growth functions. Then, dietary variations in concentrate to roughage ratios, in combination with feed additives, alternative feed sources, and processing methods, will be evaluated for support of productive animal functions. The sheep facility will allow evaluation of basic discovery principles, on a practical basis, before recommending to sheep producers by extension personnel.