Purpose. The aim of this study was to investigate the effectiveness of using IgY immunoglobulins contained in the feed additive “Globigen Life Start” for 75 days of rearing calves. Methods. In the process of the research general scientific methods were used: deduction, scientific hypothesis and abstraction. The method of groups-analogues for conducting researches on animals was used as well. Methods of variation statistics were applied for processing the obtained experimental results. Results. “Globigen Life Start” is a yellowish powder that contains egg immunoglobulins IgY and dextrose. This supplement contains specific IgY immunoglobulins, the action of which is aimed at prevention and neutralization of the following pathogens: Coronavirus, Rotavirus, Cryptosporidium, E. coli, S. typhimurium & dublin, Clostridia types A & C. The preparation is recommended to be given with colostrum, milk or in prestart feed. “Globigen Life Start” is thermostable and can withstand heating temperatures up to 80°C, which allows it to be used in granular feed. Regular use of the drug allows to get a healthy herd with normal technological growth, to minimize the addition of antibiotics and to reduce possible weight loss due to diarrhea. This feed supplement can be used from birth to 12 weeks of age. Conclusions. When studying the effect of using the feed additive “Globigen Life Start”, which contains specific immunoglobulins IgY for the prevention and treatment of bacterial infection in calves, it was found that its feeding in the amount of 10 g per head once a day during one of the drinks helps to reduce morbidity of calves from diarrhea by 22.7%.

It has been established that the blood test is one of the quick methods of assessing the physiological state of the body under the action of exogenous stimuli, what is important when testing new feed additives in pig feeding. Studies of morphological blood parameters showed that feeding young pigs with starter feed with feed additive “Activo” helped to increase the red blood cells and hemoglobin level. Thus, the hemoglobin content in the blood of pigs of the second group increased by 7.5 % compared to the control. The difference between the control and experimental groups for red blood cells was highly significant (P < 0.001) in favor of the latter. The content of leukocytes and eosinophils in the blood of young animals of the experimental group increased in comparison with the same parameter of control group, while the content of bacillary and segmented granulocytes and monocytes is insignificantly reduced or at the control level. Biochemical parameters of blood showed that in experimental animals the content of total protein increased by 19.4 %, albumin by 11.1 %, globulins by 3.07 %. These results were obtained as a result of scientific and economic experiment on two groups-analogues of young large white breed pigs of PIC genetics, 25 animals each. The initial live weight of piglets was 12 kg. The starting feed of piglets consisted of barley stubble – 28 %, wheat – 29.79 %, corn – 15 %, soybean oilcake – 22.91 %, premix “Nutrimin” – 4.3 %. During the main period of the experiment, the animals of the experimental group received the feed additive “Activo” in the amount of 0.2 kg t, which was produced by the German company EW Nutrition GmBH. The level of feeding provided average daily gains by groups within the following limits: 562 and 621 g respectively control and experimental groups. The average daily weight gain of young pigs of the second group was higher than the control group by 52 g, or 9.14 % (P ˂ 0.001). Accordingly, the absolute gain in these animals increases by 1.4 kg. Feed conversion rate per 1 kg of gain decreased by 0.18, or 8.5 % (P < 0.001) comparing to the first.

Balanced addition of essential amino acids, vitamins and minerals, easily digestible proteins, namely proteins of animal origin is an important factor for efficient feeding and pigs performance, that leads to a systematic search for new solutions when using feed additives. They provide digestibility, better absorbtion of protein, vitamins, minerals and other nutrients. Such supplements include blood plasma, meat and bone meal, fish meal and others. Besides fishmeal, other protein groups are dangerous in relation to African swine fever. Furthermore blood plasma additionally to the protein group contains immunoglobulins that can passively affect the immune system of piglets, An alternative to blood plasma is the animal nutrition supplement Globigen Jump Start, which is made from chicken eggs, containing essential and replaceable amino acids with a high percentage of absorption. Another important factor is the presence of specific IgY immuno-globulins, which being ingested have a negative effect on the pathogenic intestinal microflora, namely viruses, bacteria and cryptosporidium. Knowledge of the feed additive Globigen Jump Start effect gave impetus to the study of its effect on the piglets’ performance during the stressful period after weaning. The objective of the work was evaluation of the effect of the Globigen Jump Start fed within the pre-starter feed on the productive characteristics of post-weaning piglets. Based on the obtained research results, the best ones were shown in the experimental group, which was fed compound feed containing Globigen Jump Start in the amount of 2 kg / t of compound feed. It was found that at the end of the experiment, the weight of piglets in the control group was 19.2 kg, and in the experimental group - 21.0 kg, which is 1.8 kg or 9.4% more comparing to the control.

It has been established that the blood test is one of the quick methods of assessing the physiological state of the body under the action of exogenous stimuli, what is important when testing new feed additives in pig feeding. Studies of morphological blood parameters showed that feeding young pigs with starter feed with feed additive “Activo” helped to increase the red blood cells and hemoglobin level. Thus, the hemoglobin content in the blood of pigs of the second group increased by 7.5 % compared to the control. The difference between the control and experimental groups for red blood cells was highly significant (P < 0.001) in favor of the latter. The content of leukocytes and eosinophils in the blood of young animals of the experimental group increased in comparison with the same parameter of control group, while the content of bacillary and segmented granulocytes and monocytes is insignificantly reduced or at the control level. Biochemical parameters of blood showed that in experimental animals the content of total protein increased by 19.4 %, albumin by 11.1 %, globulins by 3.07 %. These results were obtained as a result of scientific and economic experiment on two groups-analogues of young large white breed pigs of PIC genetics, 25 animals each. The initial live weight of piglets was 12 kg. The starting feed of piglets consisted of barley stubble – 28 %, wheat – 29.79 %, corn – 15 %, soybean oilcake – 22.91 %, premix “Nutrimin” – 4.3 %. During the main period of the experiment, the animals of the experimental group received the feed additive “Activo” in the amount of 0.2 kg t, which was produced by the German company EW Nutrition GmBH. The level of feeding provided average daily gains by groups within the following limits: 562 and 621 g respectively control and experimental groups. The average daily weight gain of young pigs of the second group was higher than the control group by 52 g, or 9.14 % (P ˂ 0.001). Accordingly, the absolute gain in these animals increases by 1.4 kg. Feed conversion rate per 1 kg of gain decreased by 0.18, or 8.5 % (P < 0.001) comparing to the first.

Purpose. To investigate the effect of fumaric and lactic acids on the productivity of young cattle. Methods. In the process of the research general scientific methods were used: deduction, scientific hypothesis and abstraction. Methods of zootechnical analysis were applied to determine the chemical composition of feed. During animal experiments methods of analogue groups were used. Results. As a result of a scientific and economic experiment to study the effect of fumaric and lactic acids on meat productivity of young cattle, it was found that over the main period of the experiment the average daily gain was higher in young cattle of the second experimental group, which received by 63 g, or 8.5% more lactic acid, the difference is statistically significant (P <0.01). In young animals of the third experimental group receiving by 74 g, or 10.0% more fumaric acid, the difference is statistically significant (P <0.01), compared with the control group. In the final period of the experiment, the average daily live weight gain in young cattle of the second experimental group receiving lactic acid was by 5 g, or 0.60%, higher; in young animals of the third experimental group obtaining fumaric acid – by 8 g, or 0.90% higher, the difference is not statistically significant compared to the control group. The absence of the statistically significant difference in the average daily gain of young cattle between the control and experimental groups indicates the absence of aftereffects of lactic and fumaric acids on productivity in the final period of the experiment. Conclusions. Increase in the average daily gain of young cattle due to the use of fumaric and lactic acids is conditioned by the fact that they have shorter path of energy production compared to glucose, activate the pancreas, intestines and stomach enzymes formation.