Agent for the prevention of aggressive behavious amongst pigs

摘要

The present invention relates to the use of 2-pyrimidinyl-1-piperazine derivatives of the formula (I) in which R ¹ represents identical or different radicals from the groups hydrogen, C _1-4 alkyl, halogen, hydroxy, nitro, C _2-4 alkenyl, C _1-4 alkoxy, C _1-4 alkylthio, C _1-4 - haloalkyl, C _1-4 haloalkoxy, C _1-4 -Halogenalkylmer- capto group, R ² represents identical or different radicals from the group hydrogen, halogen, hydroxy, nitro, C _1-4 alkyl, C _1-4 alkoxy, C _1-4 alkylmercapto, C _1-4 haloalkyl, Ci- ₄ haloalkoxy , C _1-4 -Halogenalkylmercapto, C _2-4 alkenyl, X for a direct bond or a radical , R ³ represents hydrogen or C, - ₄ alkyl, A is a straight or branched alkylene having up to 6 carbon atoms which may be optionally substituted, and their physiologically tolerated salts with acids, for the prevention of rank fighting in pigs.