An experiment was conducted with 3840 male Ross x Arbor Acres broiler chicks to
test the effects of increasing dietary methionine and lysine on performance and breast
meat yield. Supplemental methionine and lysine were fed ina2 x 4 factorial arrangement
in both startei (0-3 wk) and finisher (3 6 wk) diets. Methionine was fed at levels of
NRCand 112% NRC. Lysinewasfedatlevelsof NRC and106% NRC' 112% NRC
and, l18% NRC. Increasing dietary methionine increased weight gain (P< 0.01)' feed
efficiency (P