The rapid changes in the scientific know how of the science of Animal Nutrition have taken place in last two decades. Most of the books on Animal Nutrition describe feeding practices prevalent in agriculturally advanced western countries, which are not appropriate for many of the developing countries. Therefore, there is a much felt need for a text book of advanced animal nutrition for students from Asian and other developing countries. This book is written in a very simple illustrative and coherent manner with all updated information so that every student of animal science including scientist/researchers and academicians, at national and international level will be benefited. This book is the result of a multi-author effort. The contributors were invited at national as well as international level for their expertise as topics and professional involvement. This book attempts at providing a clear, thorough and up-dated information fundamentals to animal nutrition, as well as its application, each topic is discussed from a multidisciplinary angle to aid and assist understanding, and not merely as a routine to fulfill the requirement of syllabi. Many chapters are devoted to special topics like feeding of Yak, Mithun and Equines in changing scenario of Animal Nutrition, some recent topics like global warming due to methane emission by livestock, environmental issues in livestock rearing and polices, quality assurance for livestock production and prospects of feed from genetically modified plants in livestock feeding etc. have been introduced. In editors opinion, this book will be extremely useful to all persons at national and international level who are directly involved with the science of Animal Nutrition.