Do volume, immunoglobulin G content, and feeding method of the first colostrum meal impact subsequent nursing behaviour and transfer of passive immunity in beef calves?

Abstract

Over one third of beef calves fail to achieve adequate transfer of passive immunity (TPI) through timely ingestion of colostrum, which significantly increases their risk of pre-weaning morbidity and mortality, and decreases their average daily gain. Evidence-based colostrum management guidelines are available for dairy but not beef calves. Hence, two randomized clinical trials were designed with the following objectives: to assess the impact of (1) volume and immunoglobulin G (IgG) concentration, and (2) feeding method of the first colostrum meal on time to nurse the dam and TPI.