The effect of feed additives of domestic production on the intestinal health of laying hens

The article presents the results of studying the effect of various feed additives — adsorbent “Mustala” based on the mineral shungite (LLC “Nadvoitsky plant TDM” Purecarelia, Russia), prebiotic “Vetelact” (LLC “NVTS Agrovetzashchita”, Russia), probiotic “Profort” and phytobiotic “Intebio” (LLC “Biotrof”, Russia); enzyme preparation “Fidbest R” (ACCORDING to Sibbiopharm, Russia). Two series of experiments were conducted in vivarium conditions. In the first experiment, the effect of the “Vetelact” prebiotic and the “Mustala” sorbent was compared with the control, and in the second, the effect of three drugs: the “Profort” probiotic, the “Intebio” phytobiotic, and the “Feedbest R” enzyme supplement. Further, the evaluation of the “Vetelact” prebiotic was carried out in the conditions of industrial chicken keeping — at the poultry farm of LLC «Poultry Farm “Lindovskaya” — breeding plant» of the Nizhny Novgorod region. The use of probiotics, as a rule, leads to an increase in the number of one or two types of beneficial microflora, since it contains one or more strains of beneficial microorganisms. In this study, when testing the probiotic “Profort” in the microbiota of blind processes, an increase in lactobacilli was observed, their content increased by more than 2.5 times. Prebiotics contain nutrients for microorganisms and can stimulate the growth of several species at once. In the study, when using the “Vetelact” prebiotic, an increase in bifidobacteria and lactobacilli was noted — by 42.9% and 14.6%, respectively. Drugs that are not intended to directly affect the microbiota, such as sorbents, enzymes, and phytobiotics, have an indirect effect on the microbial profile, which does not always have a positive effect. Thus, the addition of the feed enzyme “Feedbest R” led to an increase in the number of lactobacilli in the microbiota by 4 times, and the sorbent “Mustala” led to a decrease in the number of lactobacilli by 2.3 times.