Naimat Ullah, Sarzamin Khan, Muhammad Mobashar, Shahbaz Javaid, Tarique Tonio and Asif Mahmood, 2019. Fat Supplementation in Diet of Friesian Sahiwal Crossbred Bulls: A Novel Study on Productive and Reproductive Performance and Bio-chemicals Evaluation of Semen Quality Under Hot Summer Sub-tropical Conditions. Pakistan J. Zool., 51: 2133-2140. DOI: http://dx.doi.org/10.17582/journal.pjz/2019.51.6.2133.2140