Abstract

It has been established that the absolute indicators of the length and mass of the muscular part of the stomach of broiler chickens of the ROSS-308 cross significantly increase in the period from the first day of postnatal ontogenesis to 14 days of age, and at the subsequent stages studied, this process proceeds without significant deviations. Morphometric indicators of the muscular part of the stomach were especially high in chicks of the 3rd and 4th groups of broilers, which were additionally given probiotics at the late stages of postnatal ontogenesis, starting from the 14th day.