A method of producing an anabolic response in animals selected from the group of swine, cattle, sheep or poultry comprising administering to the animal an anabolically effective amount of one or a mixture of two or more compounds of the following formula <IMG> (I) wherein X1, X2 and X3 independently represent halogen, preferably chloro; A represents hydrogen, alkali metal, alkaline earth metal, zinc, iron, manganese or -?Z; and Z represents C1-C11 alkyl, C1-C11 haloalkyl or C1-C11 hydroxyalkyl is disclosed. The anabolic response is exhibited by one or more of the following: an increased growth rate, increased milk production, increased protein content/ increased fiber production, improved reproductive performance, and increased feed conversion efficiency. Also claimed are feed compositions containing the active compounds.
