1.Anous, M.R. 1991. A comparative study of muscle-bone relationship in the hind lamb of goats and sheep. J. Anim. Prod., 53: 81-87.

2.AOCA.1990.Association of Official Analytical Chemists. 15th ed., Association of Official Analytical Chemists, Washington DC.

3.Asfaw, N. and Jabbar, M. 2008. Livestock ownership, commercial off-take rates and their determinants in Ethiopia. In: The 9th Research Symposium of ILRI (International Livestock Research Institute), Feb. 2008, Nairobi, Kenya. pp. 50- 52

4.BASF. 1984. Baden Aniline and Soda Factory., 2nd ed., Germany, pp. 441.

5.Birhanu, T., Getachew, A.M. and Mengistu, U.L. 2013. Effect of green prosopisjuliflora pods and noug seed cake (Guizotia abissynica) on digestibility and performance of Blackhead Ogaden sheep fed hay as a basal diet. Science, Technol. and Art Res. J. 2(2): 38-47.

6.Dejen, A. 2010. The Effect of Feeding Different Proportions of Maize Stover and Haricot Bean (Phaseolus vulgaris) Haulms Supplemented With Mixtures of Concentrate Diet on The Performance of Hararghe Highland Goats. M.S. thesis, Haramaya University, Haramaya, Ethiopia.

7.Emebet, L. 2008. Supplementation of Blackhead Ogaden sheep fed haricot bean (Phaseolus vulgaris) haulms with mixtures of wheat bran and brewers dried grain: effects on feed utilization, live weight gain and carcass parameters. M.S. thesis, Haramaya University, Haramaya, Ethiopia.

8.Fimbres, H., Hernandez, G.V. Pivon, R.F.J. Kawas, R.J. and Lu, C.D. 2008. Productive performance and carcass characteristics of lambs fed finishing ration containing various forage levels. Small Rumin. Res., 43: 283-288.

9.Fasil, N.W., Mengistu, U.L., Yosef, M. and Getachew, A.M. 2015. Effects of different feedingregimes on leather quality of finished blackhead ogaden sheep. Sci. Technol. Art Res. J., 4(2): 222-227

10.Getahun, K. 2014. Effect of concentrate sup4plementation on performances of Ethiopian lowland Afar and Blackhead Ogaden lambs. Anim. Vet. Sci., 2(2): 36-41.

11.Jabbar, M.A. and Anjum, M.I. 2008. Effect of diet with different forage to concentrate ratios for fattening of Lohi lambs. Pakis. Vet. J., 28: 150-152.

12.Kefelegn, K., Tsegay, T., Mengistu, U.L. and Yoseph, M. 2011. Analysis of growth performance data in sheep using fixed and random regression models. Livest. Res. Rural Dev., 23(10) Article #208. Retrieved January 2, 2019, from http://www. lrrd.org/lrrd23/10/kefe23208.htm

13.Mekuriaw, S., Mekuriaw, Z.,Taye, M., Yitayew, A.Assefa, H. and Haile, A. 2012. Traditional management system and farmers’ perception on local sheep breeds (Washera and Farta) and their crosses in Amhara Region, Ethiopia. Livest. Res. Rural Dev., 24, Article #4. Retrieved May 27, 2015, from http:// www.lrrd.org/lrrd24/1/meku24004.htm

14.MOARD. 2007. Ministry of Agriculture and Rural Development. Livestock Development Master Plan Study. Volume K: Hides and Skins. Addis Ababa, Ethiopia, pp. 312.

15.Nargierddy, N.K., Yerradoddi, R.R. Micheal, B. Devanaboyina, N. Thamatam, M. Belum, V.S. and Chintalapani, R.D. 2012. Growth performance and carcass characterstics of growing ram lambs fed sweet sorghum baggase based complete rations varying in roughage to concentrate ratios. Trop. Anim. Health Prod., 44(7): 1717-1724.

16.SAS. 2008. SAS user’s Guide, Virsion 9.1.3. SAS Institute Inc. Cary. NC, USA.

17.Seethalakshmi, M.K., Sundaram, S.M,. Kumarja, R., Sivakumar, T., Gnanaraj, P.T. and Murugan, M. 2008. Carcass characteristics of Madras Red lambs fed diets of varying level forage and concentrate. J. Vet. Anim. Sci., 39: 10-13.

18.Seid, M., Mengistu, U.L., Getachew, A.M., Kassahun, A. Girma, A. and Arthur, L.G. 2012. Effects of level of concentrate supplementation on growth performance of Arsi-Bale and Boer × Arsi-Bale male goats consuming low quality grass hay. Trop. Anim. Health Prod., 44: 1181-1189.

19.Snowder, G.D. and Fiel, H.A. 1994. Carcass characteristics and optimal slaughter weight in four breeds of sheep. J. Anim. Sci., 72: 932-937.

20.Solomon, G., Azage, T., Berhanu, G. and Dirk, H. 2010. Sheep and goat production and marketing systems in Ethiopia: characteristics and strategies for improvement. IPMS working paper No. 23, Addis Ababa, Ethiopia.

21.Stosic, P. 1994. Biological factors influencing the nature of goat skin and leather.M.S. thesis, University of Leicester, UK.

22.Tripathi, M.K., Karim, S.A., Chaturvedi, O.H. and Singh, V.K, 2006. Effect of ad libitum tree leaves feeding with varying levels of concentrate on intake, microbial protein yield and growth of lambs. Livest. Res. Rural Dev., 18: Article #179. Retrieved February 28, 2015, from http://www.lrrd.org/ lrrd18/12/trip18179.htm

23.Tsegay, T., Mengistu, U. L.andYosef, M. 2012a. Skin/ leather quality of indigenous and crossbred (Dorper x Indigenous) F1 sheep. Livest. Res. Rural Dev., 24: Article #56. Retrieved October 2, 2013, from http://www.lrrd.org/ lrrd24/4/tekl24056.htm x

24.Tsegay, T., Mengistu, U.L. and Yosef, M. 2012b. Carcass measurements, conformation and composition of indigenous and crossbred (Dorper x indigenous) F1 sheep. Pak. J. Nutri., 11(11): 1055-1060.

25.Van Soest, P.J. and Robertson, B.J.1985. Analysis of forages and fibrous foods.Lab Manual for Animal Science.Department of Animal Science, Cornell University, Ithaca, New York, USA

26.Vicent, V. 2007. Chemistry of leather. Retrieved August 25 2013 from http://www.leatherbeltdirect.com

27.Wondwosen, A., Solomon, M. and T. Adugna, 2010. Supplementation of cottonseed, linseed, and noug seed cakes on feed intake, digestibility, body weight, and carcass parameters of Sidama goats. Trop. Anim. Health Prod., 42: 623-631.

28.Wondwosen, B.A., Solomon, S. and Yosef, M. 2013. Effect of substitution of concentrate mix with Sesbaniasesban on intake, digestibility, body weight change and carcass parameters of Arsi-Bale sheep fed a basal diet of native grass hay. Trop. Anim. Health Prod., 45: 1677-1685.

29.Yusuf, A.O., Bawala, O.T. and. Adegbenjo, F.D 2012. Performance and digestibility of West African Dwarf sheep fed varying level of forage and concentrate ratio. Adv. Agric. Biotechnol., 2(12): 12-15.