[13][14] Dujardin won the Horse of the Year Show competition four times and was a winner at All England Jumping Course at Hickstead on three occasions.

[20] On 19 April 2015 in Las Vegas, Dujardin and Valegro won the FEI World Cup with a score of 94.169% on the final day of competition.

[21][22] In 2019, Dujardin was eliminated from the Longines FEI European Championships after blood was found on her horse, Mount St John Freestyle, after her test.

[26] Two days later, in a routine accompanied by music which included Land of Hope and Glory, The Great Escape and the chimes of Big Ben;[8] the pair won the gold medal in the individual dressage event, with a score of 90.089%.

[28] On 14 December 2016, Dujardin retired Valegro at the age of 14 after completing a freestyle test at the Olympia London International Horse Show.

[29] On 23 July 2024, Dujardin pulled out of competing at the 2024 Summer Olympics in Paris after a video emerged of her repeatedly whipping a horse during training.

[31] The FEI described Dujardin's actions in the video as "engaging in conduct contrary to the principles of horse welfare",[32][33][34][35] and was suspended from competition while a full investigation was carried out.

[36] Dujardin said in a statement she was "deeply ashamed" and the incident "was completely out of character and does not reflect how I train my horses or coach my pupils".

[30] The day after her suspension was announced, Dujardin's UK Sport funding was halted pending the outcome of the FEI investigation.

[37][38][39] Two days after Dujardin was suspended, board members of the International Dressage Riders Club, including her former mentor and Olympic teammate Hester, issued a statement "universally condemn[ing]" her actions.