Sales and race performance of juvenile Thoroughbreds with surgically corrected large colon displacements.

Background: Juvenile Thoroughbreds can be expensive to raise and train to race. Part of the economic return in these juveniles are the weanling, yearling and 2-year-old in training sales at which major surgeries must be declared.

Objectives: To determine if surgically corrected large colon displacements were associated with a reduction of sales price and racing performance. We hypothesised that the surgery would be associated with a reduced sales price but would not be associated with a reduction in race earnings or starts.

Study Design: Retrospective cohort study.

Methods: The medical, sales and racing records of horses less than 2 years old that had a surgical diagnosis of large colon displacement were examined (n = 110). Surgical cases were compared with a control group (n = 299) whose sales and racing data were evaluated.

Results: There was no significant difference in median sale price overall between the two groups. Horses undergoing surgery had a reduced number of starts in the 2-year-old year (1 start; p < 0.001) when compared with control horses (2.32 starts), but no significant difference over the 2- to 4-year-old period. There was no significant association with surgery on earnings within the 2- to 4-year-old period of racing when compared with controls.

Main Limitations: The main limitations for this study were the retrospective design, relatively small number of horses and covering only the 2- to 4-year-old period of the horses' racing career.

Conclusions: Overall, the results of this study suggest that if the juvenile Thoroughbred requires surgery for a large colon displacement, there is minimal association with sales price or race performance compared with their siblings. With this information, it will be easier to make informed decisions to take young horses to surgery.