Ultra Boss Pour-On from Merck Animal Health - a synergized formulation in low volume dosage maximizes control of horn flies, face flies, lice, sheep keds and sheep lice. Also aids in the control of horse, stable and black flies, mosquitoes and ticks. Ultra Boss Pour On is for use on lactating and non-lactating dairy cattle, beef cattle and calves, sheep, lactating and non-lactating dairy goats, and horses. Controls horn flies for up to 8 weeks; provides season-long (January to April) lice control with one application. Contains 5% permethrin and 5% piperonyl butoxide. Dosage: Cattle and Horses - Apply 3 ml per 100 lbs body weight along back and down face; Goats and Sheep - Apply 1.5 ml per 50 lbs body weight along back. Repeat once every 2 weeks if needed. May be used with automatic dosing systems and back rubbers. No slaughter withdrawal, no milk discard. One quart treats 57 550-lb cattle.
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