FIELD: agriculture, fodder production. SUBSTANCE: invention proposes to use 2-amino-4-methylthio-(S-oxo-S-imino)-butyric acid salts as fodder addition of the formula: 
where R is H, Na, K; if R is H then X = 0 or 1; if R is Na or K then X = 0 taken in the amount 1.5-5.0 mg/kg living mass. EFFECT: enhanced growth rate of animal living mass, decreased consumption of fodder per production unit. 3 tbl, 3 ex
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