| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Squall | bay | f | 1946 | Umidwar | Heavenly Wind | Thoroughbred | ||
| Squall Linda | d.-bay | f | 1996 | Summer Squall | Glimmer Glass | Thoroughbred | USA | |
| Squan Song | d.-bay | f | 1981 | Exceller | Foreign Missile | Thoroughbred | USA | |
| Square Angel | bay | f | 1970 | Quadrangle | Nangela | Thoroughbred | Canada | |
| Square Generation | chestnut | f | 1969 | Olden Times | Chavalon | Thoroughbred | USA | |
| Squaw | d.-bay | f | 1975 | Speak John | Fearless Gal | Thoroughbred | USA | |
| Squawker | d.-bay | f | 1970 | Bold Lad | Track Medal | Thoroughbred | USA | |
| Squawking | bay | f | 1940 | Thoroughbred | Great Britain | |||
| Squeeze-Em | chestnut | f | 1869 | Skedaddle | Thoroughbred | USA | ||
| Squib | br. | f | 1872 | Thoroughbred | Great Britain |