Durvet Dairy Bomb 55-Z kills and repels flying and crawling insects in homes, barns, dairies, food plants, and outdoor areas. Safe for use on cattle, horses, swine, and poultry, its natural pyrethrins formula provides fast knockdown without leaving oily residue. The nonflammable, low-odor aerosol delivers even fog and optimal particle suspension, with a 10 to 1 ratio of synergists to pyrethrins for maximum insect control.