First Defense-Bolus (30 Doses)

Product is currently on manufacture backorder.

This product cannot be sold/shipped to Canada.

First Defense is a natural product of bovine origin offering guaranteed levels of protection against both bacterial and viral scours (E. coli and Coronavirus) in calves. A single dose provides antibody driven immediate immunity. No vaccination stress. USDA Veterinary Biologic. OMRI listed for organic operations.