Horses can be placed on this list for reasons of illness, overall soundness or fitness to race.
| Horse Name | Horse Breed | Date On | Track On | Date Off | Official Vet Exam | Work | Qualify | Vet List Type |
|---|---|---|---|---|---|---|---|---|
| Sherwood Forester | Thoroughbred | Fort Erie Racetrack | No | X | ||||
| Shesanaturalblonde | Thoroughbred | Woodbine Racetrack | No | X | ||||
| Showing Sin | Thoroughbred | Fort Erie Racetrack | No | X | ||||
| Shuddacuddawudda | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Silence Breakers | Thoroughbred | Woodbine Racetrack | Yes | |||||
| Silent Creek | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| Silent Ghost | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Silent Oaks | Thoroughbred | Woodbine Racetrack | No | X | ||||
| Silent Party | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Silent Respect | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Silent Warrior | Thoroughbred | Woodbine Racetrack | No | X | ||||
| Silly Simone | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| Silver Shasa | Thoroughbred | Fort Erie Racetrack | No | X | ||||
| Simply Silent | Thoroughbred | Fort Erie Racetrack | No | X | ||||
| Sing Your Life | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Sir Seamus | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Sky Warden | Thoroughbred | Fort Erie Racetrack | No | X | ||||
| Sledgehammer | Thoroughbred | Woodbine Racetrack | No | X | ||||
| Sligo One | Thoroughbred | Woodbine Racetrack | No | X | ||||
| Small Talk | Thoroughbred | Woodbine Racetrack | Yes | X |