Kilkenny was first ridden by an Irish rider, Tommy Brennan, with whom he competed at the 1964 Badminton Horse Trials and in the 1964 Tokyo Olympics.

He was ridden again in the 1966 Badminton Horse Trials and then at the 1966 Eventing World Championship at Burghley, where he won team gold.

Under Wofford, Kilkenny continued to have great success, first winning the 1967 USET Nationals, before earning the team gold at the Pan-American Games and finishing 4th individually.

However, a broken caulk in the show jumping resulted in a fall, and disappointedly dropped the pair from second individually down to sixth.

Following his third Olympics, Kilkenny was retired at Ledyard, and carried Wofford out fox hunting for 6 years.