On Scottish beef farms, continental breeding dominates the suckler herd. Limousin, Charolais and Simmental account for close to 60% of beef-sired calf births in 2016.In France, where many of the beef breeds used in Scotland originate, cross-breeding is not practised. Instead, beef herds are kept pure when breeding. Does this mean French farmers are losing out on the benefits of hybrid vigour that we try to breed into our cows in here in Scotland?