The experiment was conducted to investigate the response of the replacement value of dried atella to noug seed (Guizotia abyssinica) cake on feed intake, digestibility, Body weight change, feed conversion efficiency, and economic feasibility of Washera lambs.For the experiment, twenty- five washera lambs with an average initial body weight (BW) of 20.08 ± 1.14 kg (mean ± SD) were used. Randomized complete block design (RCBD) was used for the experiment. The experimental animals were grouped into five blocks based on their initial BW, and each animal within each block were randomly assigned to the five dietary treatments. The treatments were T1 (100% DA), T2 (75% DA +25% NSC), T3(50 % DA + 50% NSC), T4 (25% DA + 75% NSC), and T5 (100% NSC). The supplements were offered at the rate of 300 g/day/head on dry matter basis, which was offered twice per day at morning and afternoon in equal portions. Common salt and water were easily available at all times. The digestibility trial was for 7 days after 90 days of experimental period. The natural pasture hay had 6.06% CP, 64.5% NDF, 42.4% ADF, and 9.2% ADL on DM basis. The lowest dry matter intake (735.2 g/d/h) was observed on experimental animals supplemented with the sole dried atella feeding group than noug seed cake (941.8 g/d/h). The apparent CP digestibility cefficient (0.84) was higher (P<0.001) for treatments which had higher noug seed cake supplementation of treatments(T5) than the dried atella supplemented in (T1). The Washera lambs fed supplemention of dried atella had low Body (58g/d/h),while the supplemented of sole noug seed cake sheep gained higher Body weigh t (82g/d/h). The highest (P<0.001) FCE was observed in the noug seed cake supplement ed treatments than the dried atella supplemented, but no significant differences (P<0.001) were recorded among the final Body weight. The sheep fed dried atella with noug seed cake in (T2) had the highest net return was observed in (658.8 ETB) and highest MRR in ratio (1.6). The sheep supplemented with NSC alone in (T5) had the lowest net return(592. 6 ETB) as compared to the other supplemented treatments. Thus, it is recommended that