The research was conducted on 25male lambs of Awassi sheep to compare the effect of using different levels of whole cotton seeds(WCS). 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 six equal groups of an average weights (24-25) kg each.