Improving the productive qualities and breeding values sheep southern meat breed in the gene pool of a closed herd population is based on the use of the developed rotational diagram of the selection of rams to ewes with purebred breeding, providing a number of generations maintaining a high level of productivity of sheep intense and their advantage in live weight – 36.5%, fertility – 20.8%, precocity, from 15.1% to 18.3 percent, and wool productivity – up to 36%, compared to the requirements for the breed, as well as the repair of the herd at the expense of its own reproduction without the expensive import of paternal breeds.

A brief history and characteristics of the old type of tsigay sheep and the newly created highly productive type of tsigay sheep, called sunny, are given.

The article presents: the history of the creation of sheep of the Chernozemelsky Merino breed; indicators of live weight and wool shearing of animals of different sex and age groups; characteristics of the main lines are given.

The article provides tips on how to avoid some errors in the performance of experimental work, which reduce the reliability of the results obtained, recommended for use in the production of meat, wool and other sheep products.

Genealogical structure of the livestock of goats producing the bio-analogue of human lactoferrin has been studied for the first time in the Republic of Belarus. Successors of lines and families have been determined, and a comparative assessment of using various selection profiles for obtaining goats and dams of the stock of genetically engineered animals has been carried out.

The indicators of live weight and measurements of body weight in fat-tailed sheep of different breeds in age dynamics in the conditions of the semi-desert zone of the South-east of Kazakhstan are given. The change in these indicators in sheep of different breeds in the age dynamics under the influence of environmental factors can be considered as one of the indicators of their adaptation to these conditions, in this case, to the conditions of the semi-desert zone of the South-East of Kazakhstan.

this article contains the results of the change of body weight body measurements, meat and wool productivity created breed type and their comparative features with Farharskim factory type Cissar breed sheep, as well as their clinical, morphological and biochemical indices of blood.

The article provides information about some physico-chemical and technological parameters of milk obtained from East Frisian sheep and its crossbreeds with the Romanov breed of sheep when breeding them in the central region of Russia.

The dynamics of body weight from birth to 8 months of age are considered; indicators of slaughter and shearing of wool from Kuibyshev and crossbred rams of different origins: ½ (Kuibyshev x Soviet meat-wool) and ½ Kuibyshev + ¼ blood of the Volgograd breed and ¼ Suffolk.

Experimental data on the milk production of goats of the Zaanen and Anglo-Nubian breeds in the conditions of the Lower Volga region are presented.

The results of the study of the influence of the age of slaughter of sheep at 6 and 8 months are presented. on the economic efficiency of lamb production. When rearing and feeding rams up to 8 months of age, the feed costs per 1 kg of gain were 6.54 ECU and 746 g of digestible protein compared to 5.81 ECU and 640 g of digestible protein in rams grown up to 6 months of age. The level of profitability of lamb production in animals sold at 6 months was 41.9%, and in sheep sold at 8 months of age-14.1%, which is 27.8% lower.

The article gives an assessment of the breeding qualities of linear rams in comparison with non-linear ones, which showed that the offspring originating from linear rams in weight growth, slaughter indicators at the age of 4 months were superior to their peers originating from non-linear rams.

The article presents the data on milk yield of ewes fat-meat breeds: Kazakh fat-tailed coarse-wooled and Kazakh fat-tailed semi-coarse-wooled breed. The study showed the average daily milk yield of ewes Kazakh fat-tailed coarse-wooled breed II and III lactation respectively 95 kg and 104 kg, Kazakh fat-tailed semi-coarse-wooled breed II and III lactation respectively 102 kg and 110 kg.

In physiological experiments, the influence of different levels of cobalt in diets on the digestibility of nutrients in the diet and the level of milk productivity of lactating sheep of the Kalmyk fat-tailed breed was studied.

The article presents data on the quality of wool certified by the Institute: its volumes, the yield of conditioned-pure mass, indicators of fiber diameter and contamination.

The article discusses ways to improve the efficiency of wool washing. The waste water discharged into the sewers from the wool-washing barges contains a certain amount of wool fibers. Waste-water fiber losses can reach more than 1 ton per year from a single wool-washing line. The article presents a new device developed by the authors for the mechanical capture of fibers in the process of washing wool, the design of which is shown in the diagram

In the article, based on the biochemical parameters of blood, the search for interior tests for their use in predicting the signs of sheep productivity at the early stages of ontogenesis is carried out.

The article is devoted to smallpox of sheep and goats, an infectious disease caused by a highly virulent virus. The disease is characterized by fever, intoxication, development of papular-pustular rash on the skin and mucous membranes. The disease causes huge damage to sheep breeding, due to losses from death, forced slaughter of animals, reduced productivity, and the cost of veterinary and sanitary and security-quarantine measures. Specific treatments for sheep pox patients have not been developed.