Twelve crossbred Suffolk male lambs with average live body weight (17kg) were randomly assigned to 3 treatments (4 lambs each) to study the effect of addition of powder onion and husk onion on lamb performance. The lamb groups were fed T1-concentrate feed mixture and Rice straw (control ration) T2-ration of T1 plus 6% powder onion and T3-ration of T1 plus 6% husk onion. The experimental period lasted for 120 days. At the end of the experimental period three animals from each group were used in digestibility trail. The main results were as follow:-                 The OM, CP, EE and NFE digestibility and total digestible nutrients of T3 was higher no significantly.DM and CF digestibility was highest significantly (P<0.05) for T3 than T2. Lambs in T1 was higher no significantly live body gain. Additives were not effect on values of serum total protein, albumin, Globulin creatinine. While were significantly (P<0.05) on values of GOT and GPT. Additives were effect decrease on cholesterol values. Significant differences of TVFS's at all times.