The breeding stock sales are, by definition, where many of the best broodmares and foals are offered under the hammer, but many fine racing prospects have emerged from these sessions in recent years. Some farm the sales better than others, notably trainers Joseph O'Brien and Paddy Twomey, who have made a habit of replenishing their stables with high-class runners each winter. So who fared best this winter? O'Brien and Twomey were back again, with the pair signing for some interesting prospects with a view towards next season, while a number...