Cruelty frequently happens in racing although rarely get reported. This report in the Daily Mail proved the exception yesterday at Royal Ascot.
Personally I would have banned the jockey for life.

Frankie Dettori has a record of being banned as long as your arm. Including for excessive use of the whip. He also confessed to using drugs to keep his weight down.

But he won his first Derby this year and that made him untouchable.