Identifying calf management practices and health events that impact cow productivity

The goal of the dairy industry is to create a well-balanced and profitable cow. Closely linked, production and longevity have the greatest economic value of all genetic traits. The economic impact of longevity on farm is related to three main elements, the cost of raising heifers, profit made during lactation, and reduction of premature/involuntary culling. To improve these aspects genetic evaluations are used to optimize cow performance. However, most studies and breeding programs have not focused on evaluating the impact of calf performance. The objective of this study was to evaluate the impact that calf management practices and health have on the cow achieving its genetic potential for longevity and production. A cohort study was performed on 225 animals whose records were collected from birth until they leave the herd. Estimated breeding values will be used to determine each calf's genetic potential for production, health, and longevity. Multivariable regression will identify any calfhood environmental and health factors that interfere with a calf's ability to reach its genetic potential for production and longevity traits. Understanding the impact of these factors can help to optimize health management practices on farms, improve profitability, and enhance the genetic potential for increased longevity