Perosis is one of the most common leg pathologies in broiler chickens, during the period of intense weight gain – at the age of 14–35 days. Due to manganese deficiency, the number of sick birds can reach up to 5% of the flock. These studies were carried out in order to establish changes in some indicators of protein, macro- and micromineral metabolism in the blood serum of clinically healthy broiler chickens and birds with perosis at 14, 21 and 28 days of age. A batch of 2,000 Cobb-500 crossbred broiler chickens was selected. Two groups of chickens were directly involved in the research, in which blood was taken at the age of 14, 21 and 28 days: healthy birds and those with perosis signs. Clinical studies showed that 8.0% of chickens on 28th day suffered from perosis. Trace mineral biochemical parameters of serum and blood of broiler chickens with perosis on the 28th day of life significantly differed from those of healthy birds (manganese and zinc). It was found that on the 28th day of life the weight of chickens with perosis was reduced by 42.7%, causing a loss of weight 88 kg per batch of 2000 birds, with a consumption of feed 140 kg. The obtained data will allow the development of early perosis prevention schemes in broiler chickens, which will help manage production losses and increase its profitability. On farms, to prevent the occurrence of perosis, it is necessary to take into account the technological factors of the production of compound feed. Also, an increase in the level of total protein and albumin in serum in the blood may indicate inflammatory processes and dehydration of the body. Therefore, it is better to site a sick bird separately for rearing or hand over to a sanitary culling.

Trace elements in the body of the bird are in small quantities, but their role in productivity remains important. In order to get a quality carcass at the slaughterhouse, you need a constant supply of nutrients and, last but not least, microelements. Zinc and Manganese are essential trace elements that affect the growth and development of birds. And their deficiency in the body has a negative effect on the productivity of birds. In the diet of broilers trace elements are mainly added with a premix in the form of inorganic salts (sulfates, carbonates). However, these micronutrient compounds in the body of the bird are insufficiently absorbed, and increasing the dose of their introduction can cause toxicosis. Therefore, in order to prevent microelementosis, it is more appropriate to use organic compounds (chelates), which have a much higher level of bioavailability and less release into the environment. This review article describes the prophylactic efficacy of Zinc and Manganese chelates in micronutrient deficiencies in broiler chickens and laying hens. With a deficiency of a particular trace element develop metabolic disorders and other pathologies (perosis, etc.). Based on the presented data, it can be concluded that the use of organic forms of trace elements in poultry feeding is a better alternative to inorganic sources, as they can be used in smaller quantities. But due to their greater bioavailability, they are better absorbed, which has a positive effect on the productivity of broilers. Since knowledge about the use of chelated forms of trace elements in comparison with inorganic forms (salts, sulfates, etc.) in the diet of poultry is still poorly understood, it is necessary to further conduct research to prevent micronutrient deficiencies in these compounds.

Perosis is a common metabolic disease of industrial birds, especially broiler chickens. It leads to a violation of the balance of biotic substances in the body of chickens, which is clinically manifested by the curvature of the limbs, reduced mobility, and, consequently, reduced profitability of meat production. Prevention of perosis is possible provided that chickens receive a sufficient amount of manganese in a biologically available form. Studies were conducted to determine the efficiency of use of manganese chelates (pantothenate and lysinate) for prevention of perosis in broiler chickens. Efficacy was confirmed by examining changes in the clinical state, indicators of protein and mineral metabolism, as well as meat productivity of birds. For the experiment, broiler chickens of the Cobb-500 cross were taken at the age of 14 days. The birds of the control group received a standard diet, and the chickens from two experimental groups additionally received manganese pantothenate and lysinate with water during the critical period for the development of perosis – 14–28 days old. After 14 days of administration of manganese pantothenate and lysinate, the weight of the experimental birds at the age of 28 days was greater by 133.6 g (+11.0%) and 142.2 g (+11.7%), respectively, in comparison with poultry of the control group. Additional provision of manganese pantothenate and lysinate to chickens of the experimental groups contributed to an increase in the blood serum total protein concentration by 11.0% and 12.8 %, albumin – by 10.1% and 8.2%, magnesium – by 8.1% and 9.0% and manganese – by 29.6% and 26.9%, respectively, compared with indicies of the control group birds. The use of manganese chelates in the form of pantothenate (0.2 mL/L of water) and a lysinate (0.5 mL/L) during the 14–28th days of broiler chickens’ rearing provides 100% prevention of perosis. This reduces the death of broiler chickens, increases body weight, and, as a result, significantly increases the profitability of meat production.

Toxicobiological effect of mycotoxins association of the Penicillium and Fusarium fungus (T-2 toxin at a concentration of 0.1 mg/kg, fumonisin B1 ‒ 0.5 mg/kg, vomitoxin (DON) ‒ 0.1 mg/kg, penicillic acid ‒ 1 mg/kg) was accompanied by the development of a complex pathological process in weaned piglets. In this regard, the detoxification and sorption capacity of the complex feed additive "Harufix+" based on mannanoligosaccharides was studied. The additive effect on the resorptive activity of mineral and vitamin nutrients of feed under the normal feeding conditions and in case of contamination with mycotoxins has been studied. The use of enterosorbent offset the toxic effects of micromycete metabolites, which contributed to the growth of piglets. Thus, weight growth rate increase of the piglets in group 1 (i.e., those whose diet included the additive, unlike the diet of the animals in control group) constituted 16 %, while their average weight growth rate was high and constituted 1.96 kg per day. In addition, during the study of calcium, phosphorus, magnesium, ferum, zinc, copper and manganese in the piglets blood was not found excretion of these elements with a sorbent, moreover, noted the normalization their blood level. The study content of vitamins A and E, the same as with mineral nutrients, has not been established decrease during treatment with study the pharmaceutical. The obtained results testify the active absorption in the gastrointestinal tract of the vitamin components within the fodder combined with fodder additive “Harufix+” and high biological accessibility of its transport forms. The efficiency of the additive can be explained by its composition, namely the complex of mineral and organic components that are formed by modification of the organic cations of the mineral surface. Key words: mycotoxins, mycotoxicosis, macro- and microelements, sorbent, vitamin metabolism, piglets.

The article presents the results of the use of the vitamin-amino acid chelates (pantothenates) of Zinc and Manganese in order to study their effect on some indicators of avian metabolism. The studies were started on 14-day Cobb 500 broiler chickens in the poultry farm of the Bila Tserkva National Agrarian University Training and Production Center. For this purpose, 3 groups poultry were formed: two experimental ones (Zinc and Manganese chelates were fed to the main diet with water) and a control group (50 heads each). During the experiment (14, 21, 28 days), weighed chickens followed by blood sampling for biochemical study. In the group where the chelates were drunk at a dose of 0.2 ml/l of water over the next 14 days, there was a tendency to increase the absolute weight gain in broiler chickens to 943.0 ± 25.94 g (770–1073), compared with the control – 883.2 ± 24.64 g (740–1140). The bird, which was given chelates at a dose of 0,1 ml/l of water for 14 days, increased the content of total protein in the serum by 10.3% compared to the beginning of the study, and was 30.9 ± 0.71 g/l (P < 0.001). In the second group (chelate dose of 0.2 ml/l water), this indicator increased by 11.2% and amounted to 30.2 ± 0.82 g/l (P < 0.01). At the end of the experiment (28 days of cultivation), the albumin content in the blood of the birds of the first and second experimental groups was 18.6 ± 0.36 and 18.7 ± 0.37 g/l (P < 0.001 before the first selection). Manganese concentration in broiler chickens of the second experimental group on the 28th day was 3.6 ± 0.28 μmol/l and was higher than the control (2.7 ± 0.25 μmol/l; P < 0.01). At doses of 0,1 ml/l of water (1st experimental group), there was a tendency to increase the amount of this trace element in serum to 3.2 ± 0.16 μmol/l (1.4–4,0). After 14 days of chelating, Zinc content in the serum of chickens of the first experimental group increased by 20% and amounted to 27.9 ± 0.60 μmol/l, in its second – concentration increased by 25.8% (28.3 ± 0.76 μmol/l; P < 0.001) compared to the start of the experiment. Therefore, the use of the vitamin-amino acid chelates of Zinc and Manganese for 14 days at a dose of 0,1 and 0.2 ml/l of water contributed to the increase in weight gain, increase of total protein, Manganese and Zinc in the serum of broiler chickens.

The rapid growth of demand for poultry products requires its sufficient production by specialized farms of various forms of ownership. However, such production needs are not always adequate to the selection approach, the incubation component, the basic requirements of veterinary and sanitary and zoohygienic support, breed and age characteristics of keeping and raising poultry. Therefore, one of the crucial components of obtaining biologically complete, high-quality and fast-paying products of the poultry industry, including all stages of its production, is human support of the main links of ontogenesis (development after birth) of the bird. The issue of not only the creation of the genetic potential of the parent bird of different species and areas of productivity, but also the provision of veterinary and sanitary conditions for their maintenance, breeding and breeding remains relevant. However, the current economic conditions have forced the heads of enterprises and veterinary departments to some extent bypass the planned laboratory tests of feed, water and blood, which, although not complete, but informative enough to trace the main periods of growth and development of the bird. Slight deterioration of the mode and quality of feeding, changes in the parameters of the microclimate are reflected in changes in blood parameters. And what about the spoilage of feed, water, violation of veterinary and sanitary maintenance of poultry: the lack of preventive treatments with vitamin-mineral, hepatoprotective and enzyme preparations, pre- and probiotics. Which can lead to metabolic disorders in poultry. Which can occur due to disorders of protein, lipid, carbohydrate, vitamin, macro- and micromineral metabolism. As a result, there are significantly popular diseases such as: uric acid diathesis, cannibalism, osteoporosis and osteomalacia, perosis, rickets, obesity, E-hypovitaminosis. Further reducing productivity, which leads to large economic losses on farms.

It has been established that the level of blood parameters in the body of sheep is not always stable and often depends on the breed, sex, their physiological state, the level of productivity, feeding and housing conditions. Among the factors that determine the optimal sheep nutritional level, not the last place is occupied by their provision with a sufficient amount of essential amino acids, especially lysine, methionine, cystine, and vitamins, given their physiological importance for the animal body. The overwhelming amount of them is able to be synthesized in the sheep rumen with the help of microorganisms of the gastrointestinal tract, however, some of them are irreplaceable, that is, those whose balance must be replenished through feed rations. The article describes the use of the vitamin-amino acid complex "Аlphabet for Animals" in sheep, containing a complex of fat-and water-soluble vitamins, as well as amino acids, which contribute to the normalization of metabolism in the body of small ruminants, increase its resistance, have a positive effect on productivity, safety and reproductive animals functions. During the research, the effect of this feed additive on hemocytopoiesis and the exchange of essential micronutrients in ewes were studied. After a double use of the additive, an increase in the processes of erythrocytopoiesis was established, as evidenced by an increase in the number of blood erythrocytes by 21.2% and the hemoglobin content by 11.2%, stabilization of the size and degree of saturation of erythrocytes with hemoglobin, as evidenced by a decrease in MCH and MCV indices. There were no significant changes in the content of essential micronutrients in the blood serum of sheep under the influence of the "Alphabet for Animals", and a slight increase of zinc content in the blood was noted in sheep after the second injection of the drug. At the same time, in the blood of experimental animals group a significant increase the iron content on average up to 129.5±7.33 μg/100 ml (p<0.05) was established, and the number of animals with a low amount of blood iron was only 12.5 %. The number of leukocytes in the sheep blood of both groups was within the normal range and during the second and third blood tests did not change significantly. Key words: sheep, feeding, feed additives, amino acids, vitamins, hemocytopoiesis, essential micronutrients.

Culling due to poor condition, weight loss, mortalityand, as a result, economic losses due to perosa, accordingto various estimates, 1-5% of the group of birds. Due to thedysfunction of the limbs, the bird can suffer from a numberof diseases. Lack of essential nutrients play an important rolein the development of perosis in poultry. Often in farms dueto cost savings, reduce the cost of feed for broilers, which inturn can lead to metabolic disorders in poultry. Therefore, thediagnosis of these disorders requires new approaches. Modernscience is increasingly inclined to non-invasive diagnosis ofmetabolic pathologies. In human medicine, nails and hair areused to study persistent micronutrient deficiencies. And inveterinary medicine in the study of micronutrient deficienciesas a method of non-invasive diagnosis using animal hair.According to the results of our research, theconcentrations of microelements (Zn, Mn) in the feathers of14, 21 and 28-days-old clinically healthy and feathery broilerchickens were determined. On day 14 of the disease, theconcentration of Zinc and Manganese in broiler chickens withperosis was 65.6 ± 2.73 and 17.4 ± 0.79 μg / g, which wasprobably higher than in clinically healthy birds 46.5 ± 1.57(p <0.001) and 10.9 ± 0.80 (p <0.001) μg / g. Analyzing the indicators of micronutrients in the clawsof patients with feathers of broiler chickens of 28 days ofage, the content of Manganese was 10.2 ± 0.51 μg / g, whichis probably less than in clinically healthy birds 15.7 ± 0.97μg / g (p < 0.01). The concentration of zinc in the claws ofhealthy birds is 127.6 ± 3.65 μg / g, which tended to increasecompared to that in healthy birds - 98.3 ± 5.40 μg / g.The results of the analysis show that in birds with signs ofperosis, Zinc and Manganese accumulate in higher concentrations in the feathers compared to clinically healthy chickens. Inturn, the concentration of these elements in the claws in chickens with feathers relative to healthy birds of the group decreases. Key words: trace elements, non-invasive diagnostics,metabolic pathologies, avian.