If animals could talk they'd say Jeffers.
Prozap Bovi-Bullet
Prozap's Bovi-Bullet is an economical option designed for effective control of face flies, horn flies, lice and ticks on cattle. Ideal for use on mineral feeders, the Bovi-Buller attaches easily with a metal ring for easy hanging. Allows for a low stress application of insecticide for cattle. Each Bovi-Bullet is 18" long.
For best results, use in conjunction with Prozap insecticides.