The use of beef sires on lower-end genetic-merit cows has become a widespread trend in dairy herds around the world. Extensive use of sexed semen has enabled producers to breed all the herd replacements they need from their higher ranking cows, and with an over-supply, surplus heifers no longer attract a premium price in the marketplace. Crossbred beef calves provide an added farm revenue stream, but which sires should you use? Here we bring you some details of the most popular beef-on-dairy sires.