For the third time in four years, Sioux Nation was the busiest Flat stallion at stud in Britain and Ireland in 2025, according to the Return of Mares, which has been published by Weatherbys. The son of Scat Daddy, who stands at Coolmore's Castlehyde Stud in County Cork, was usurped last year by his ill-fated stud-mate, Calyx, but he returned to the top of the charts during the latest breeding season, having covered 282 mares. The busiest stallion of any description was Whytemount Stud's Affinisea on 314, ahead of Boardsmill...