Among the various types of productive animals, goats have recently become of greal importance in industrial farms. Dairy goat breeding in this cluster is one of the most prospective in Russia, and the Saanen breed is one of the most highly productive dairy goat breeds. Obtaining products from goats is associated with various problems, and above all with the receipt and rearing of young animals, which is especially pronounced when growing replacement young animals. However, when rearing replacement young animals, specialists are faced with factors that directly and indirectly affect the harmonious development and high productivity potential of animals of this breed. To develop evidence-based measures for growing, feeding, keeping and treating animals, it is necessary to know the characteristics of the individual development of their organism, to reveal the mechanisms of the development of the physiological, biochemical and immunological status in ontogenesis, in particular in postnatal ontogenesis. The individual development of the organism of goats is determined by heredity, which is fully realized when, at each stage of development, the body is provided with specific and obligatory environmental conditions for it. Science and practical experience show the higher the genotypic potential of the animal is the more complex these relationships are. The signal for the realization of the genotypic potential of the reproductive and productive functions in animals is the environmental factors that change with the seasons of the year. Among these factors are the heliogeophysical, natural-climatic and microclimatic parameters which are of the greatest importance. But in order to use these patterns to predict and develop specific preventive measures, it is necessary to have a systemic model of the morphological and functional parameters of the organism, taking into account the species, breed, age and other characteristics of animals. Physiological and biochemical parameters of blood play a special role and key importance both in the process of assessing the physiological status of the animal organism and in the process of timely diagnosis of pathological factors.