Dr. Maryane Oliveira, a postdoctoral research associate in the Stein Monogastric Nutrition Lab, presents the results of a study to know the optimal tryptophan:lysine ratio for 25 - 40 kg growing pigs fed with distillers dried grains with solubles. Adapted from a presentation at the 2021 ASAS Midwestern Section meeting, March 8-10.