The early life stage of a calf is crucial for its subsequent development, health and productivity as a dairy cow. The project KalbVital aims to support this stage of life through innovative breeding approaches and practical, data-driven calf management. To achieve this, comprehensive phenotypic and genetic data of calves are collected and analysed. The phenotypic data include the health and the weight development of the calves. The projects findings will help to improve calf vitality and underscore the growing importance of animal welfare and animal health in livestock farming.