The most concentrated and economical lice & fly controlpour-on on the market today. It controls biting andsucking lice, horn flies and other pests. Its low-volumeapplication rate reduces waste and animal stress. One16 oz. bottle can treat up to 32 animals (1000 lb. or larger). Can be used on lactating andnon-lactating dairy cattle and beef cattle with no withdrawal time required. It is non-systemicand can be used year round without the worries of reaction that sometimes occurs withcattle grub treatment. Provides horn fly control for up to 6 weeks after application.