BI - Controls lice, horn flies, face flies, keds, horseflies, stable flies, mosquitoes, blackflies, sheep keds and ticks. Can be applied on lactating dairy cattle, beef cattle, calves, and sheep. Low toxicity-can be applied on cattle of any age. Dosage: Cattle: 1/2 oz per 100 Lb. 5 oz. max. Sheep: 1/4 oz per 50 Lb. 3 oz. max.