TY CONF TI INFLUENCE OF PROBIOTIC FEED ADDITIVES ON THE METABOLISM AND PRODUCTIVITY OF RUMINANT ANIMALS KW ruminants KW live weight gain KW safety of calves KW probiotics KW metabolism. JO XIII All-Russian scientific-practical conference of young scientists «Achievements and prospects of development of the Russian agriculture", dedicated to the memory of R.G. Gareev AU Hoggui, M.. AU Krupin, E.. AU Gaynullina, M.. PY 2023 PB TRIA FRC Kazan Scientific Center of RAS