Giving your copper bolus to your goats has never been easier. Bolus guns come in 2gm and 4gm applicators and can only accept 2gm or 4gm copper bolus. Bolus fits snuggly into the gun, will not fall even if shaken. place into the side of the goat's mouth, towards the back of the tongue and pull the trigger. DONE. 2gm copper is recommended for kid goats under 6 months of age and the 4gm for adult goats. The 4gm should be applied once a year and the 2gm twice a year. Before you supplement with a copper bolus be sure to check and see if your area is in need of copper supplements. When ordering please go to www.kikoevent.com and click on GCI STORES to pay with credit card and check out all the other items available through GCI Stores. FREE SHIPPING on order.