this invention relates generally to the field of antimicrobial teat care compositions . more particularly , it relates to a skin - adhering antimicrobial composition comprising a copolymer which contains methacrylic acid and 2 - acrylamido - 2 - methyl - propane sulfonic acid monomeric units , the antimicrobial composition hindering the transfer of bacteria from the environment to underlying teat surfaces and orifices , and which is compatible with both mammalian tissue , including skin , and teat dip compositions .