The research was conducted on 24 male lambs of Awassi sheep to study the effect of using different levels of soya bean meals(SBM), partially dehulled sunflower meals (SFM) and partially dehulled cottonseed meals(CSM). The experiment extended for 70 days, experimental units were rested, then left for an adaptation period of 10 days, during the adaptation period, the animals were housed in one pen, in the end of the adaptation period, the lambs were individually weighed, then divided according to live weight into three equal groups of an average (22-25)kg each. The concentrates was the same for all groups in protein and energy intake, but the difference was only in percentage of SBM21%, SFM 20%, and CSM15%.