This study was conducted at Al-shulla sheep station, Ministry of Agriculture on 20 Awassi lambs to study the effect of replacement cheese by product (whey) and ground corncobs by the soybean meal and wheat bran. Animals were divided randomly into two group. Group 1 consist of 10 lambs fed on an ordinary ration (control group), while lambs in group 2 (10 lambs) fed normal whey (whey) and 24.1 % of ground corncobs in replacement of soybean meal and wheat barn. Hemoglobin concentration and red blood cell count were increased significantly for lambs in group 2, while the erythrocyte sedimentation rate, pH value,glucose and urea in the blood were not. Higher Alkaline phosphatase activity (135.22 ± 10.11 K.A.U./ 10 ml) and Alanine amino transferase concentration (38.18 ± 4.46 U/ l) were recorded for lambs in group 2, while cholesterol concentration, acid phosphatase and Aspartate amino transferase were not different between the two groups. It can be concluded that there were no any side effect from using the why and ground corncobs in the lams feeding.