Doug’s research program has a strong applied research focus; relevance to the poultry industry remains an important consideration in his approach to research. In addition to practical research on feedstuff quality and dietary supplement evaluation in poultry diets, Doug’s work focuses on nutrition-immune function interactions and bone biology in meat- and egg-type poultry. In addition, he has conducted field research trials in commercial poultry facilities in Canada, Colombia and Ecuador. In 2016, he spent a 6-month sabbatical in Colombia, working with a major broiler integrator. He is currently part of the National Research Council’s committee to revise and update the 1994 Nutrient Requirements of Poultry.