An experiment was conducted to compare the effects of an inorganic Se source with an organic Se source on daily layer performance and whole-egg Se concentrations in laying hens. The Louisiana State University Agricul- tural Center Animal Care and Use Committee approved the protocol.
Two hundred eighty-eight Hy-Line W-36 laying hens,3 approximately 70 wk of age, were used for the experi- ment. A corn-soybean meal basal diet was formulated to provide 0.82% total lysine and 2,950 kcal/kg of ME to the laying hens (Table 1). The basal diet met or exceeded the other nutrient requirements suggested in the Hy-Line W-36 Commercial Management Guide (Hy-Line Interna- tional, 2003). The basal diet contained a trace mineral