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 |
|---|---|---|---|---|---|---|---|---|
| Magic Gamble | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Magic Skys | Thoroughbred | Fort Erie Racetrack | No | X | ||||
| Magical Tale | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| Majestic Melody | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| MAJOR CUSTARD | Standardbred | Mohawk Park | Yes | X | Long List | |||
| MAJOR MOTION | Standardbred | Rideau Carleton Raceway | No | Short List | ||||
| Malibu Uproar | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Maliciosa | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| MALOUCIOUS | Standardbred | Mohawk Park | Yes | X | Long List | |||
| Mamma Katz | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Manalucius | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| MANON | Standardbred | Mohawk Park | Yes | X | Long List | |||
| Marjorie's Dream | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Marriage Counselor | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| Martina's Gals | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| Mary Sue Weloveyou | Thoroughbred | Woodbine Racetrack | No | X | ||||
| Master Connor | Thoroughbred | Fort Erie Racetrack | Yes | X | ||||
| Maximum Perfection | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Maytheforestbwithu | Thoroughbred | Woodbine Racetrack | Yes | X | ||||
| Mazikeen | Thoroughbred | Fort Erie Racetrack | Yes | X |