The book “Necessity of repair heifers in zinc and its rationing in diets with green feed” by Nikolai Alekseevich Davydov is a unique study. which immerses the reader in the world of animal husbandry , Focusing on the importance of micronutrients in the diet of farm animals. In this work, the author shares his deep knowledge and practical experience, which makes the book an indispensable tool for specialists in the field of agronomy, veterinary medicine and animal husbandry, as well as for students and teachers of relevant faculties. Davydov, known for his scientific works and research in the field of animal nutrition, in this book considers one of the key topics - the need for repair heifers in zinc. This trace element plays an important role in metabolism, affects the growth, development and reproductive functions of animals. The author not only explains how zinc affects the health and productivity of heifers, but also suggests methods of rationing it in the diet, especially in the conditions of using green feed. The book will be of interest not only to professional veterinarians and agronomists, but also to farmers who seek to improve the efficiency of their production. It can also attract the attention of students of agronomic and veterinary universities who want to deepen their knowledge in the field of animal feeding and their health. Understanding the micronutrient needs of animals, such as zinc, will help readers not only improve the living conditions of their wards, but also increase the overall productivity of farms. The topics raised in the book cover a wide range of issues, from the biochemical processes associated with zinc absorption to practical recommendations for its addition to the diet. The author emphasizes the importance of a balanced diet, emphasizing that a lack or excess of micronutrients can lead to serious animal health problems. In this context, the book becomes an important tool for raising awareness about the importance of quality feeding and its impact on health and productivity. The style of Nikolai Alekseevich Davydov is distinguished by clarity and accessibility, which allows even complex scientific concepts to be presented in an understandable form. His previous works, such as “Feeding and Feeding Farm Animals” and “Modern Approaches to Rational Feeding”, have already won recognition among professionals and students, and this book will not be an exception. Davydov is able to combine theory with practice, which makes his research especially valuable for those who work directly with animals. If you are looking for information on how to properly organize the feeding of repair heifers, or want to learn more about the role of trace elements in the diet of animals, this book will be a real find for you. Not only will it expand your knowledge, but it will also help you take the right steps towards improving the health and productivity of your animals. Thus, “The need for repair heifers in zinc and its rationing in diets with green feed” is not just a scientific publication, but a practical guide that will help you become a more confident and competent specialist in the field of animal husbandry. Do not miss the opportunity to immerse yourself in this fascinating and important topic that can change the approach to feeding and caring for your wards.