The Irish Cattle Breeding Federation (ICBF) has a difficult line to pursue. Primarily, its role is data-driven. The information is collected and collated, and the results are the results. But there is also a subjective part to the star ratings system, in terms of how much weight is attached to each trait. And the drive to reduce the carbon footprint of the beef herd is a relatively recent priority; it hardly rated as a factor in farming a decade ago.This sudden change in priority has created a disconnect between the animals getting top prices at pedigree sales and their star rating, particularly stars for breeding replacements.