Cephalosporins; disease prevention, Ipronidazole; other nitroimidazoles; furazolidone; Nitrofurazone, Sulfonamide and fluoroquinolones in lactating dairy cattle, Glycopeptides; phenylbutazone in female cattle 20 months or older, Chloramphenicol; Clenbuterol; Diethlstillbesterol (DES); Dimetridazole