Failure to give cows a dry period is not only bad for milk production during the next lactation, but it also may jeopardize calf health.

According to a University of Wisconsin study, the colostrum from zero-day-dry cows contained about 40 percent less immunoglobulins (IgG) than that of cows given a 56-day dry period. However, reducing the dry period to 28 days did not hurt colostrum quality.\