Dual Protection Bolus/Gel
First Defense® Bolus and Dual-Force® Gel Tube for Calf Scours Prevention
An immediate guaranteed dose of immunity against E. coli and coronavirus infections, in a bolus or single-dose gel tube.
Instantly deliver the passive antibodies newborn calves need to prevent scours. Jump straight to antibody protection while removing reliance on the common variable vaccine response of dam- and calf-level vaccines. One dose, a single bolus or gel tube, administered at birth gives each calf a guaranteed level of protection from E. coli and coronavirus infections.
Approved by the USDA Veterinary Center for Biologics
First Defense bolus and Dual-Force gel tube are approved by the USDA Veterinary Center for Biologics, the same agency that approves scours vaccines.
Learn more about First Defense bolus and Dual-Force gel tube
Easy to Administer
The First Defense bolus can be easily administered with a balling gun. Our Dual-Force gel contains a non-digestible blue dye that serves as a marker, turning your calf’s first stool after administration a neon blue-green to help confirm proper administration.