Influence of osteochondrosis on the longevity and racing performance of standardbred trotters and pacers.

Objective: To determine the influence of clinical osteochondrosis (OC) on the short-term (2, 3, and 4-year-old) and long-term racing performance and longevity of standardbred racehorses.

Study Design: Retrospective case-control study.

Sample Population: Standardbred racehorses from a single breeding farm born between 2009 and 2017 that survived to racing age (n = 2711).