What action can Stewards take if a horse does not start fairly?

When a horse does not start fairly, the Stewards have the authority to declare the horse a non-starter. This means that the horse will be removed from the race results and will not be considered among the official finishers. Declaring a horse a non-starter is a necessary action to ensure the integrity of the race, particularly if the horse's unfair start could have affected the outcome.

In horse racing, a fair start is critical as it ensures that all competitors have an equal opportunity to compete. If a horse is prevented from starting by circumstances beyond its control—such as a late break from the gates or interference before the race begins—the Stewards, who oversee the race proceedings, must make decisions that uphold the rules and fairness of the competition.

The other options entail actions that do not directly address the issue of a horse's unfair start. Disqualifying the jockey pertains to actions taken during the race rather than at the start. Fining the owner may not be warranted as the owner is not usually responsible for the horse's inability to start fairly. Nullifying the entire race involves a much broader and more severe remedy that applies to significant issues affecting the race as a whole, rather than just addressing the starting issue of an individual horse.