TY CONF TI COMPARATIVE ANALYSIS OF CONDITIONS OF FEEDING AND MAINTENANCE OF CALVES AT ANIMAL BREEDING ENTERPRISES KW calves KW dyspepsia KW housing conditions KW early postnatal period. 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 Voronova, K.. PY 2023 PB TRIA FRC Kazan Scientific Center of RAS