Most of us utilize the benefits of using “copper bolus” Copper adds in the treatment and prevention of a variety of parasites common in goats. These guns makes the job almost easy. Bolus capsules do not slip of the neck, as they do with the straight tube applicators. Just ease into the side of the mouth and place on the back of the tongue and pull the trigger, done. The guns come in both 2 gram and 4 gram size, for adults or kids.