The aim of the study was to study the effect of diets using the potentially probiotic drug Bacillus amyloliquefaciens KB54 as part of compound feed (the rate of administration is 0. 1% of the total diet. the content of viable spores in the final product is 106 CFU/g) in the diets of laying hens of the Dekalb cross. In the course of the study. https://www.parisnaturalfoodes.shop/product-category/selenium-50-mcg/