Which came first?

Drs. Ted Byerly and Wade Brant, with the U.S. Department of Agriculture, in Beltsville, MD, discuss nutrition research on eggs and poultry. Dr. Brant demonstrates how diluted B-12 is injected into eggs for improved growth and vigor in the resulting poultry. He and Dr. Byerly explain the grade labels on egg cartons, including size determination, and they demonstrate a candling device to determine the quality of eggs. Marge Holloway, a home demonstration agent in Baltimore, fries eggs to show the differences in high and low quality eggs. Dr. Byerly discusses breeding experiments with Rhode Island Red hens for improved quantity and quality of eggs. Dr. Byerly explains the National Poultry Improvement Plan (NPIP). A film promotes the NPIP's mission and its benefits for raising healthy, thrifty chicks.