Ferdinando Almeida, Ph. D. student in the Stein Monogastric Nutrition Lab, presents the results of an experiment to determine amino acid digestibility in different sources of feather meal, with and without the addition of blood. Adapted from a presentation at the 2012 ADSA-AMPA-ASAS-CSAS-WSASAS Joint Annual Meeting, Phoenix, AZ, July 15-19.