The study is focused on the analysis of basic critical points of the calf’s life, which influence the level of their health, welfare and biosecurity, including the determination of simple selected indicators of calf health directly applicable in farm practice. The critical points of calf rearing begin during the period of insemination, continue of pregnancy, transition and calving, and are completed by the rearing of calves after birth to weaning. A vital role in calf life plays colostrum