Champion USA JustiFLY Feedthrough Cattle Fly Control, Single Non-Toxic Larvicide. Controls All Four Fly Species That Affect Cattle. Over 50 Million Head Treated

JustiFLY Feedthrough in a convenient 360gram add-pack for use on-farm, The economically priced 360-gram add-pack treats one 50-lb. bag of free choice mineral, Breaks the life cycle of horn fly, stable fly, house fly and face fly for pennies per head/day, Reduces animal-handling stress. No withdrawal period. No residues. No resistance issues, On average, each add-pack of 360gram (12.7oz) treats 1 animal for 12 months (6 pack = 18 animals for 120 days)