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The article shows the positive effect of different types of diets on the milk and downy productivity of Orenburg nanny-goats. In order to increase production and improve its quality, it is proved that it is necessary to use hay concentrate (43.6% coarse, 33.4% concentrates, 23.0% juicy) and hay (53.6% coarse, 23.4% concentrates and 23.0% juicy) type. This type of feeding allows you to increase the fleece of down, respectively by 6.63 and 12.80%, while reducing the cost of feed (feed units) by 1 kg of gain - 7.37%, by 1 kg of down - by 6.61 and 18.43%, the cost of 1 kg of down, respectively - by 6.53 and 16.55%.

The stereotype of cows' machine milking and this process efficiency largely depend on the static and dynamic stability of the vacuum mode in the vacuum line of milking plants. Value destabilization of the underside vacuum, pulsation frequency and the stroke ratio, the nature of the effect of the nipple rubber on the nipple of the udder due to fluctuations of the main vacuum lead to a decrease in the rate of milking, a decrease in the productivity of animals, the disease of animals mastitis and other negative consequences. Analysis of the air flow dynamics by the vacuum system and the vacuum regulator makes it possible to predict the operation of the milking unit in a malfunctioning state and take timely measures to exclude such operating modes. The research range was controlled by the coefficient of dynamic stability of rarefaction at an unfavorable point (the ratio of the length of the curve of the actual change in rarefaction to the projection of this curve on the time axis). The group of simultaneously operating milking units was evaluated by the ripple frequency stability coefficient. Sensitivity of various controlled parameters (air flow rate by the system, air flow rate by the vacuum regulator, sum and difference of these flows, mathematical expectations and dispersion of these parameters) to main failures of the vacuum system is established (vacuum system depressurization, pipeline clogging, technology compliance by cow milking operators, milking apparatus performance, vacuum pump capacity, etc.). The possibility of preliminary formation of control action to exclude operation of the vacuum system with vacuum mode disorders is shown.

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