K-Star is the prefix of one of the leading production herds of the US. Located at Dakota in northern Illinois, an hour south of Madison, it is owned by the Koester family who trade as Koester Dairy Inc. With a dazzling herd average of over 36,000lb/20,000kg, Koester Dairy has won the Holstein Association’s Herd of Excellence Award for the past 5 years, and the Progressive Genetics Award for the past 29 years.