Asian Journal of Animal and Veterinary Advances1683-99191996-3289Academic Journals Inc.10.3923/ajava.2018.136.143Mohamed GhanemHanaa El Sayed LashenSamah El Sayed MahmoudRania AzzamMahmoud 22018132Background and Objective: Chicks may expose to delayed post hatch feed access due to several causes which may have consequences for poultry production. The present study investigated the impacts of different delayed time's access of feed on the production performance, histological examination and carcass traits in broiler chicks and how to substitute the detrimental effect of this delay by supplementation of threonine. Methodology: A total of 300 one-day old broiler chicks "Cubb 500" were used. They were alienated into 5 experimental groups, each group was further alienated into 6 replicates of 10 birds. Several productive traits as body weight gain, feed intake, feed efficiency, mortality and carcass traits were measured. In addition, villus height, villus width, crypt depth and villus surface area were also measured. Results: Results showed that group IV which fastened 24 h after hatch and fed threonine supplemented diet showed the highest performance traits. Control group showed the least yolk residual and the highest feed intake. Group of bird fastened either 24 or 48 h showed the least weight gain compared to other groups. Regarding to carcass traits, group of bird fastened for 48 h showed the least giblets weight and dressing percentage, while group IV showed the highest values of carcass traits. Conclusion: The productive performance of chicks was improved following early access to diet after hatch through skip all obstacles that prevent early chicks feed access.]]>Bhuiyan, M.M., F. Gao, S.H. Chee and P.A. Iji,20115110021007Potturi, P.V.I., J.A. Patterson and T.J. Applegate,200584816824Yang, H., Z. Wang, S. Shi, J. Lu and W. Li,20098585593Willemsen, H., M. Debonne, Q. Swennen, N. Everaert and C. Careghi et al.,201066177188Kidd, M.T. and B.J. Kerr,19965358367Khan, A.R., H. Nawaz and I. Zahoor,200616811Han, Y., H. Suzuki, C.M. Parsons and D.H. Baker,19927111681178Marwa, A.H.,20162016Law, G.K., R.F. Bertolo, A. Adjiri-Awere, P.B. Pencharz and R.O. Ball,2007292G1293G1301Noy, Y. and D. Sklan,20018014901495Noy, Y. and D. Sklan,199839446451Speake, B.K., R.C. Noble and A.M.B. Murray,199854319334Moran, Jr. E.T.,19896811411147Pinchasov, Y. and Y. Noy,199334111120Murakami, H., Y. Akiba and M. Horiguchi,1992567584Noy, Y., Z. Uni and D. Sklan,199637987996Saki, S.A.,2005446Alhota, R.A.,20112011Geyra, A., Z. Uni and D. Sklan,200180776782Kuhn, E.R., V.M. Darras, C. Gysemans, E. Decuypere, L.R. Berghman and J. Buyse,199675595600Uni, Z., S. Ganot and D. Sklan,1998777582Noy, Y. and D. Sklan,19976344354Abbasi, M.A., A.H. Mahdavi, A.H. Samie and R. Jahanian,2014163544Jahanian, R.,20102010pp: 200Estalkhzir, F.M., S. Khojasteh and M. Jafari,20132382386Mazraeh, A.A., H.A. Shahryar, R.S.D. Nobar and A. Gorbani,20132122124Babaee, M.J.,20135412416Namroud, N.F., M. Shivazad and M. Zaghari,20088722502258Dozier III, W.A., E.T. Moran Jr. and M.T. Kidd,2001105359Azzam, M.M.M. and M.R. El-Gogary,201510215225Penz, A.M.J.R., G.L. Colnago and L.S. Jensen,1991709393Kidd, M.T. and B.J. Kerr,19976362367Kidd, M.T., B.J. Kerr, J.D. Firman and S.D. Boling,19965180190Djouvinov, D., M. Stefanov, S. Boicheva and T. Vlaikova,200536169Ciftci, I. and N. Ceylan,200445280289Deschepper, K. and G. de Groote,199536229245Bregendahl, K., J.L. Sell and D.R. Zimmerman,20028111561167Dozier, III. W.A., E.T. Moran Jr. and M.T. Kidd,20009214222Noy, Y. and D. Sklan,19997817501756Yamauchi, K.E., H. Kamisoyama and Y. Isshiki,199637909921Ferket, P. and Z. Uni,2006in ovo feeding enhances of early gut development and digestive capacity of poultry.]]>2006Yegani, M. and D.R. Korver,20088720522063