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.

Purpose: to study the effect of complex additives based on a protein hydrolyzate together with an iron-containing preparation on the metabolism of pregnant goats of the Saanen breed of the first lactation in the most stressful functional states of the body in the life of a female (the last stage of pregnancy and the postpartum period) according to the physiological, biochemical and hormonal status of the blood of animals, grown in an industrial complex.Materials and methods. Experimental studies were carried out on Saanen goats from the moment of 110 days (days) of their pregnancy upon reaching 30 days. offspring obtained from the studied animals, in the conditions of an industrial complex. In the experiment, 24 pregnant Saanen goats (first pregnancy) were used, of which 8 goats were combined into a control group, and 16 into two experimental groups, divided equally. The content and feeding of goats and kids obtained from them was zootechnically determined. In addition to the diet, the experimental animals received a biological supplement based on a protein hydrolyzate, 40 ml/head/day. and an iron-containing preparation, 10 ml/animal/day. One experimental group received the preparation "Abiopeptid" + "Bio-iron with microelements", the other - "Abiotonic" + "Bio-iron with microelements". All dietary supplements were administered to animals orally through individual numbered syringes of 20 and 10 ml. Animals received dietary supplements continuously from 110 days of pregnancy until the resulting offspring reaches 30 days. (i.e. 70 days - 40 during gestation and 30 after delivery). To assess the state of control and experimental goats, blood was taken (at 150 days of gestation and after 30 days from birth), followed by biochemical and hormonal analysis.Results. With regard to the use of bioadditives based on protein hydrolyzate in goats of the last stage of pregnancy and the beginning of the first lactation, in terms of the parameters of the physiological, biochemical and hormonal blood status, it should be noted that the beneficial properties of bioadditives aimed at enhancing the catabolic processes of the body will be effective only if the animals are provided with favorable micro- and macroclimatic parameters, in particular, a sufficient and complete diet. In case of violation of the conditions of detention, the effectiveness of biologically active substances will be provided at the expense of the body's own reserves. It should be noted the effectiveness of the iron-containing preparation "Bio-iron", used in feeding goats that are at the late stage of the pregnancy of the first pregnancy and during the milking period of the first lactation.