The study was taken place at the experimental station (kharabo), Faculty of Agriculture, Damascus University, 1464 - one day old chicks of the hybrid Lohmann were used to determine the effect of adding different levels of methionine without or with lysine on some of carcass traits. Chicks were divided randomly and equally into 8 groups (183 each) at the first day with 3 replicates for every group (61 each).