Chandra Debnath is working as Associate Professor in the Department of Animal Nutrition, College of Veterinary Sciences and AH, R.K. Nagar since 2011. He obtained B.V.Sc & A.H and M.V.Sc degree from Bombay Veterinary College (under KKV, Dapoli, M.S) and Ph.D from West Bengal University of Animal and Fishery Sciences, Kolkata. He is actively engaged in research, extension and teaching in undergraduate level. So far, he has published more than 40 research paper and popular articles in reputed national and international journals. He has also a co-author of a book and contributed in six book chapters. His current area of research is poultry nutrition with special reference to supplemental limiting amino acids.Tapan Kumar Das is working as Associate Professor in the Department of Instructional Livestock Farm Complex (Animal Nutrition), College of Veterinary Sciences and AH, R.K. Nagar since 2012. He obtained B.V.Sc & A.H and M.V.Sc degree from West Bengal University of Animal and Fishery Sciences, Kolkata and Ph.D from National Dairy Research Institute, Karnal, Haryana. The author is actively engaged in research, extension and teaching in undergraduate level. So far, he has published more than 35 research paper, review and popular articles in reputed national and international journals. He has published one book, one booklet and three chapters. His current area of research is poultry nutrition with dietary supplementation of natural herbs.