n experiment was conducted using twenty four growing Gumuz ram lambs with an initial body weight of 19.05±2.29 kg (mean ± SD) to investigate the response to supplementing different proportions of wheat bran and noug seed (Guizotia abyssinica) cake on feed intake, digestibility, body weigh change and carcass characteristics of Gumuz sheep. The sheep were treated against endo- and ecto- parasites before commencing the study. The experimental animals were grouped into six blocks based on their initial BW, and each animal within each block were randomly assigned to one of the four dietary treatments. The treatments were: natural grass hay alone (TJ) (control), natural grass hay+ 1NSC: 1WB (T2), natural grass hay+ 2NSC: 1WB (T3) and natural grass hay+ 3NSC: 1WB (T4). The supplements were offered at the rate of 400 g/day, which were offered twice per day at 0800 and 1600 hours in equal portions. Common salt and water were made available at all times and natural grass hay was given ad libitum. Samples from basal feed offered and refused as well as supplement feed offered were taken and chemically analyzed. The experimental sheep were kept in individual pens. The digestibility trial was carried out for 7 days after 15 days of adaptation period to the experimental feeds and conditions, which were then followed by feeding trial of 90 days and carcass parameters, were determined at the end of the study. Collected data were analyzed using General Linear Model (GLM) procedure of SAS (2014). For the correlation among nutrient intake, digestibility and body weight gain, Pearson correlation coefficient analysis was employed by using Statistical Package for Social Sciences (SPSS, 2011, v.20). Grass hay offered had 7.4% CP, 66.39% NDF and 58.05% ADF on DM basis. Concentrate mixtures at 1NSC: 1WB, 2NSC: 1WB and 3NSC: 1WB proportions had 21.01,23.40 and 26.72% CP, 44.44, 53.33 and 56.66% NDF and 31.11, 37.77 and 44.44% ADF on DM basis, respectively. Supplementation improved both DMI and apparent digestibility. Supplemented treatments had higher (P<O. 01) total DM1 (712.53- 724.92 g/d) than the control (672.55 g/d). Apparent CP digestibility was higher (P<O.001) for supplemented treatments than the control. Sheep fed sole grass hay did not lose or gain body weight, while the supplemented sheep gained B W within the range of 44.26-86. 67g/sheep/day with significantly higher (P<O.OOl) differences among the supplemented groups. Better (P<O.OOl) FCE was observed in the supplemented treatments than the control, but no significant differences (P>O.OOl) were recorded among the supplemented treatments. Supplemented sheep had better carcass characteristics than the control. Among the main carcass components, no significant differences (P>0.05) were observed in Sternum (Brisket) and tail fat weight within the supplemented groups. Sheep fed natural grass hay alone had the lowest net return (-114.46 ETB) and had lowest (P<O.OOl) values for carcass parameters than the supplemented treatments. Sheep supplemented with 3NSC: 1WB (T4) had the highest net return (287.78 ETB and highest MRR (4.96) compared to the other supplemented treatments. Thus, it is recommended that supplementation of hay with 400 g/head/day concentrate mixture at 3NSC: 1WB proportion is biologically efficient and potentially profitable in the feeding of growing Gumuz sheep.