All of the Roudybush diets are formulated by avian nutritionist Tom Roudybush, M.S. In his 16 years of nutritional research at the university of California, Davis, 10 of which specifically focusing on the nutritional requirements of pet birds, Tom has become a leader in the avian nutrition field. His work is the basis for most of the published nutritional research in pet birds that are available today. What does this mean for you and your pet? It means that when you purchase Roudybush you know you are providing your bird the best possible nutrition so they can live their lives to the fullest.