Dual Protection Bolus/Gel

Dual Force

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.

30 Dose and 50 Dose Loose Bolus Gun

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

Reach My Rep

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.

Top 7 Things People Ask

FREQUENTLY ASKED QUESTIONS

Watch our sales and marketing team answer the seven questions we get asked the most.

Top 7 Things People Ask
“We have been using First Defense for the last 3 to 4 years and are really happy with the product. For us it’s important, it’s a big investment and a huge return. The product is convenient and versatile. Knowing we have protection as soon as the calf hits the ground is satisfying and comforting. This product gives assurance.”
– Dan Kullot, DVM, Syracuse Dairy, Syracuse, KS
Dan Kullot
  • Pathogen PreventionPathogen Prevention
  • E.ColiE.Coli
  • CoronavirusCoronavirus
  • RotavirusRotavirus
  • Approved UseApproved Use
  • USDAUSDA
  • OMRI/OrganicOMRI/Organic
  • TraceabilityTraceability
  • StorageStorage
  • ShelfShelf
  • RefrigerateRefrigerate

  • First Defense® Bolus
    5 or 30 Dose

  • Pathogen Prevention
  • E.Coli
  • Coronavirus
  • Rotavirus
  • Approved Use
  • USDA
  • OMRI/Organic
  • Traceability
  • Storage
  • Shelf
  • Refrigerate

  • First Defense
    Technology®
    90-Dose Bulk Powder

  • Pathogen Prevention
  • E.Coli
  • Coronavirus
  • Rotavirus
  • Approved Use
  • USDA
  • OMRI/Organic
  • Traceability
  • Storage
  • Shelf
  • Refrigerate

  • Dual-Force
    First Defense®
    Single-Dose Gel Tube

  • Pathogen Prevention
  • E.Coli
  • Coronavirus
  • Rotavirus
  • Approved Use
  • USDA
  • OMRI/Organic
  • Traceability
  • Storage
  • Shelf
  • Refrigerate

  • Tri-Shield
    First Defense®
    Single-Dose Gel Tube

  • Pathogen Prevention
  • E.Coli
  • Coronavirus
  • Rotavirus
  • Approved Use
  • USDA
  • OMRI/Organic
  • Traceability
  • Storage
  • Shelf
  • Refrigerate