Productivity and livability of poultry largely depends on the metabolism and the immune system. Feed additives used in poultry diets can have a significant impact on the power of the immune system. The addition to the basic ration of broiler chickens Tocsfin in an amount of 0,11% and Probitocs in a dose of 0,10% by weight of complete feed had not the same effect on the course of metabolic processes in the body. The most pronounced anabolic metabolism character has been marked in the group in addition of Probitocs. It was characterized by an increase in the blood of poultry content of hemoglobin by 22,3% at 28 days and 3,7% at the age of 39 days, the total protein content by 6,6 and 11,7%, glucose by 3,2 and 24,8%, total lipids by 7,9 and 18,6%, β-lipoprotein by 71,6 and 12,6%. However feed additive Tocsfin in the diet of broilers provided the highest titer of antibodies to infectious bursal disease, which in comparison with the control group at the age of 39 days was 3,0 times higher, to infectious bronchitis by 1,8 times, Probitocs has provided the difference in 2,4 and 1,5, respectively. At 4 days of age the highest antibody titer to Newcastle disease when diluted 1 : 64 was observed in the III trial group with Probitoсs feed additive, in the control and the II trial group with addition Tocsfin – 1 : 128. At 39 days age the maximum titer at 1 : 64 dilution occurred in the group with the feed additive Tocsfin in the control group and feed additive Probitocs – 1 : 32, which provided 60,0 and 50,0 percent protection of birds, respectively. During the period of rearing and fattening of broiler chickens in the control group and with the addition of Tocsfin at the same feed expenses rate of absolute weight gain of poultry 2157,47 g and 2145,94 g has been obtained, in the group with the addition of Probitocs 2305,25 g or 6,8% higher that reduced the cost of feed by 6,4%.

The study of the influence of feed additive Vetosel E forte quality on goose hatching eggs has been carried out. The use of feed additives Vetosel E forte have not had the significant influence on the quality of the hatching eggs, except for statistically significant (P ≤ 0,05) increase in the weight of eggs from geese of the 3rd experimental group who used the drug at a dose of 0,6 ml/10 liters of drinking water, which in turn affected the weight of the protein and the shell. Increase the dosage of the feed additive Vetosel E forte up to 0,6 ml/10 liters of drinking water helps improve embryo viability and increase the output of standard young poultry.

The conducted research aimed at studying the growth and development of heifers Blackand-White breed with the input in the diet of the drug Albite-Bio. It has been established that the input in the diet of dry cows and calves of the drug Albite-Bio allows you to increase the intensity of growth of young animals and to reduce incidence in dairy heifers during rearing.

The aim of the research was to determine quality characteristics such as palatability, digestibility, nitrogen metabolism, the productive potential of the silage of Eastern Galega of variety Gale and red clover of variety Early 2 as mono feed in the rations of lactating cows. The data obtained by changes in the content of nitrogen fractions in the rumen of cows suggests that the input in the ration of cows of the 2 trial group of silage of Eastern Galega intensified digestibility of protein feed with simultaneous increase in bacterial protein synthesis. The input in the ration of lactating cows silage of Eastern Galega has a positive impact on the number of protozoa in the rumen, mainly due to the intensity of reproduction of the larger and motile ciliates, resulting in increased microbial biomass, an important source of complete protein for animals. This has increased their milk production by 6.8%, the digestibility of protein by 4.8%, extraction of protein with milk by 18.4%, the content of carotene in the blood by 12.3%.

Scientifically justified the possibility and effectiveness of use of feed additives M-Feed in diets of young sheep meat-lard production in the arid zone of Southern Russia. The optimal dose of the drug and its positive effect on digestibility, utilization of nutrients of the diet, growth rate, meat and wool productivity, hematological parameters of blood has been found. The data obtained showed that the best uptake of nitrogen, the use of calcium, phosphorus, and sulfur by the rams in both absolute and relative terms has been observed in animals of the 2nd experimental group when adding them to the diets of feed additives M-Feed in an amount of 5 g per 1 head/day. At the same beginning live weight the rams of the 2nd experimental group to the end of the experiment had body weight 75,9 kg, 6,26 kg more than control analogs (P < 0,01), 4,1 kg then the 1st experimental group (P < 0,001) and 2,84 kg then the 3rd group (P < 0,01). The rams of the 3rd experimental group also had higher final live weight 73,06 kg, which was higher than at control herdmates compared by 3,94 kg (P < 0,01) and the 1st group by 1,26 kg (P > 0,05). During the period of experiment the rams the 2nd experimental group was given absolute increase 39,57 kg, which was higher than at control by 6,06 kg, analogues of the 1st experimental group by 4,43 kg and the 3rd by 2,51 kg. Best indicators for slaughter differed in animals of the 2nd experimental group. So, the rams of that group, the weight of chilled carcasses was 3,64 kg or by 12,3% (P < 0,05) than analogs from the control group, 2,9 kg or 9,5% then the 1st experimental group (P < 0,05) and 1,9 kg or 6% then 3rd group. Judging from the wool of rams of the experimental groups has been found that the best quality of wool had animals fed with M-Feed in an amount of 5 g/head./day.