He will be out for another six months, Colin Campbell, his Dunedin part-owner and breeder, said.
Leighton Hest had filling in a hind leg after he finished seventh in the Dominion Handicap at Addington last November. The leg was scanned and a minute hole detected in the tendon.
The tendon was split and he had shock wave therapy, Mr Campbell said.
Now a 7yr-old, Leighton Hest has won nine of his 30 starts.
The Dream Vacation-Whitney Hest gelding, trained by Phil Williamson, won seven times from nine starts at 4.
His wins included the Harness Jewels at Ashburton and the Four-Year-Old Trotters Championship.
Stablemate Springbank Richard is close to having a trial and may resume in the Ordeal Cup at Addington on September 16.
The winner of 19 races, including the 2009 Dominion Handicap and 2007 Victoria Trotting Derby, Springbank Richard won the Banks Peninsula Cup last October at his second start after a break.
He was runner-up to Dr Hook and Let Me Thru in Interdominion heats in Auckland.
Springbank Sam and Duke Of The Moment are due back in work with Williamson in a fortnight.
Springbank Sam won three races last season and ran Paramount Geegee to half a head in the Northern Trotting Derby.
He was also runner-up to Paramount Geegee in the NZ Trotting Derby and Harness Jewels.
Duke Of The Moment was a 2yr-old winner last season.
• Second Wind, who has not raced since late October, won a workout at Ashburton on Sunday in 3.06.8 for 2400m, the last 800m in 58.4.
Second Wind was put aside after he performed poorly in the latter two of his three starts last season.
The Simon Adlam-trained Second Wind won nine races, including the group one Taylor Mile from 16 starts as a 4yr-old the previous term.
