1995: two-year-old season Key Change began her racing career in a one mile race for juvenile fillies at
Navan Racecourse on 18 October. She started the
7/4 favourite but finished fourth of the eighteen runners behind the Kevin Prendergast-trained Anwaar. Twelve days later she contested a
maiden race over the same distance at
Leopardstown Racecourse and recorded her first success, beating the colt Clear Blue Water by a short head.
1996: three-year-old season On her three-year-old debut, Key Change was matched against colts and started a 12/1 outsider for the Listed Ballysax Stakes over ten
furlongs at Leoprdstown on 12 April. With Murtagh on the Oxx stable's more fancied runner Harghar (the 2/1 favourite), the filly was partnered by Dermot Hogan. Key Change recorded her first significant victory as she came home six
lengths clear of Harghar. Two weeks later she started favourite for the Avonmore Classic Trial at
Gowran Park and won by one and a half lengths from the
Aidan O'Brien-trained His Excellence. The filly was sent to England and moved up sharply in class to contest the
Group Two Ribblesdale Stakes at
Royal Ascot on 20 June in which she was ridden by
Christy Roche she started the 13/2 third choice in the betting behind the
Musidora Stakes winner Magnificent Style. After starting poorly she made steady progress in the straight and finished second, beaten a neck by the French-trained Tulipa, with Shemozzle in third. At the
Curragh Racecourse on 14 July she was one of six fillies to contest the
Irish Oaks and finished third, beaten a short head and two lengths by
Dance Design and Shamadara, with
The Oaks winner
Lady Carla in fourth. In the Group One Yorkshire Oaks at
York Racecourse on 21 August, Key Change started at odds of 7/1 in a nine-runner field. Before the race John Oxx had been pessimistic about her chances as he felt that the
going would be too firm for her to show her best form. After the race Oxx said "I knew she was better today than before the Irish Oaks but I didn't really believe she would win. But she has won so well that we will have to consider the
Irish St Leger or
Prix Vermeille". When asked about running the filly in the
Prix de l'Arc de Triomphe, a race for which she had not been initially entered, he added "We'd be happy to supplement if she won another race and had put some more money in the bank, Her owner loves to tackle big races". On 21 September Key Change was matched against colts and older horses in the
Irish St Leger over fourteen furlongs at the Curragh and was made the 11/4 favourite. After tracking the leaders she took the lead entering the straight but was overtaken approaching the final furlong and was beaten into second by the four-year-old
Oscar Schindler.
1997: four-year-old season Key Change remained in training as a four-year-old but made only one appearance when she was sent to France for the
Prix Jean de Chaudenay over 2400 metres at
Saint-Cloud Racecourse on 18 May. She began to struggle before entering the straight and was eased down by Murtagh to finish tailed-off last of the five runners. She reportedly returned from the race "a sick horse" and despite recovering later in the year she did not race again. ==Breeding record==