Professor, Department of Poultry Science, College of Veterinary Science, Assam Agricultural University Khanapara, Guwahati, Assam Retired Professor, Department of Poultry Science, Madras Veterinary College, Tamil Nadu Veterinary and Animal Science University, Chennai, Tamil Nadu Professor, Department of Poultry Science, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, Assam