ISSUE FOCUS 40 FEED & ADDITIVE MAGAZINE February 2026 Calf rearing represents a major investment for the future of a dairy farm, and its success is determined by many factors, including the management of the first hours of life. Colostrum provides energy, essential antibodies, and nutrients for the future performance and health of the animal. Effective management is critical to ensure passive immunity transfer, reducing mortality while boosting future production. THE FUNDAMENTALS OF COLOSTRUM MANAGEMENT: THE 5Q’s RULE Optimal colostrum management follows a precise methodology summarized by the "5Q’s" rule. Each of these parameters has to be strictly monitored to ensure the survival and development of the newborn calf. Each "Q" is defined by specific scientific thresholds that must be met. Quality is defined by the concentration of immunoglobulin G (IgG) in the colostrum. Colostrum is considered high quality when it contains at least 50 g/L of IgG1. In practice, this corresponds to a value greater than 22% on the Brix scale when using a refractometer. Scientific data indicates that colostrum measuring less than 18% Brix is highly insufficient, while values above 28% Brix represent excellent quality. It is important to note that visual appearance, such as color or density, is not a reliable indicator of actual antibody concentration. However, more yellow or darker colostrum generally contains higher fat content. Colostrum management is the first and most decisive step in securing a calf’s survival, health, and long-term performance. As calves are born without immune protection, the quality, quantity, timing, hygiene, and verification of colostrum intake determine the success of passive immunity transfer. Applying science-based colostrum management practices reduces early-life mortality, strengthens disease resistance, and lays the foundation for lifelong productivity in dairy herds. COLOSTRUM MANAGEMENT: A PASSPORT TO LIFE Mélody Baudon Export Technical Manager Elvor – Savencia Group Julia Novitska Export Sales Manager Elvor – Savencia Group
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