1. Department of Animal and Fish Production, Faculty of Desert and Environmental Agriculture, Matrouh University, Matrouh, Egypt
2. Animal and Poultry Nutrition Department, Desert Research Center, Cairo, Egypt
3. North Carolina Agricultural and Technical State University, Greensboro, North Carolina, USA
4. Department of Animal Production, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
5. Department of Animal and Veterinary Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khod, Oman