Roudybush, Inc. manufactures specialized bird foods. This manufacturing is a result of the research by an avian nutritionist, Tom Roudybush. During his 16 years of nutritional research in the Department of Avian Sciences at the University of California, Davis, Tom studied a variety of birds, including 10 years of research on the nutritional requirements of companion birds. Mr. Roudybush has generated most of the published nutritional research in pet birds, and the research flocks of Orange-winged Amazons at the University have been maintained on nothing but Roudybush pellets since 1981; no other population of psittacines has been maintained on a commercially available, formulated diet for such a long period of time.