This book is an invaluable resource for graduate, postgraduate, and doctorate students studying veterinary dairy, agriculture, fisheries, and other related fields. It offers a comprehensive overview of the important aspects related to the contribution of livestock to national income, community development, panchayati raj, livestock development programs, audio-visual aids, extension teaching methods, program planning, adoption and diffusion process, livestock marketing, and animal husbandry management and administration. The book is also beneficial for professors, teachers, trainers, researchers, and extension professionals engaged in veterinary and animal husbandry extension and other professional courses. We are confident that this book will provide essential information for those pursuing studies in these fields.