Calf scours and calving pasture rotation.

The system uses clean calving pastures to prevent direct contact between older calves and younger calves. Although the cow herd serves as the source of calf scour pathogens from year to year, the average dose load of pathogen exposure to calves is likely to increase over time within a calving season because calves infected earlier serve as pathogen multipliers and become the primary source of exposure to younger susceptible calves. [Extracted from the article]