Spring Chicken (牝 1904 栗毛 Gallinule)
 |-- Yokohama (牝 1911 鹿毛 Santoi)
 |   |-- Royal Yoke (牝 1917 芦毛 Roi Herode)
 |   |   `-- Royal Ford (牡 1926 芦毛 Swynford)
 |   `-- Yam (牝 1922 黒鹿毛 Hapsburg)
 |       `-- Geraldine (牝 1930 鹿毛 Stimulus)
 |-- Spring Thyme (牡 1912 鹿毛 Spearmint)
 |-- Scaramuccia (牝 1916 栗毛 Spearmint)
 |   `-- Scarborough (牝 1924 黒鹿毛 Bridge of Earn)
 |       |-- Fleetborough (牝 1938 栗毛 Haste)
 |       `-- Bayborough (牝 1940 鹿毛 Stimulus)
 |-- Scuola d'Atene (牝 1917 鹿毛 Bayardo)
 |   |-- Scuola Genovese (牝 1924 鹿毛 Galloper Light)
 |   |   |-- Schiavona (牝 1931 栗毛 Captain Cuttle)
 |   |   `-- Scuola Bolognese (牝 1934 黒鹿毛 Blandford)
 |   `-- Sanzio (牡 1928 鹿毛 Papyrus)
 `-- Scopas (牡 1919 鹿毛 Sunstar)