Abstract
It was found that the absolute parameters of the length and weight of the liver of broiler chickens of the ROSS-308 cross significantly increase during the period from the first day of postnatal ontogenesis to the age of 14 days, and at the subsequent studied stages this process proceeds without significant deviations. Liver morphometric parameters were especially high in broiler chicks of the 3rd and 4th groups, who were additionally given probiotics at the late stages of postnatal ontogenesis, starting from day 14.
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