Diego Navarro, a Ph. D. candidate in the Stein Monogastric Nutrition Laboratory, presents the results of an experiment to determine the chemical composition and physicochemical characteristics of eight feed ingredients, and to calculate their effects on in vitro ileal and total tract digestibility of dry matter. Adapted from a presentation at the 2017 ASAS Midwestern Section meeting, Omaha, NE, March 13-15.