Yearling X-ray lesions and the effect on longterm performance in Thoroughbred horses

Radiography is a key part of stakeholder decision-making when buying, selling and managing Thoroughbred yearlings. In Australia, a standard set of radiographs obtained within 42 days of sale must be provided with each yearling presented at the major yearling sales. For purchasers, this information — along with airway endoscopy and physical examination — help determine the level of risk associated with each horse. For vendors, the knowledge obtained can help with presale management and expectations around sale performance of Thoroughbred yearlings.

However, the interpretation of radiographic findings in Thoroughbred yearling horses can be difficult. Although there is scientific literature on the topic, there are limitations to the knowledge available including disagreement between studies on the relevance of findings, a paucity of information regarding the future effect of specific radiographic lesions, small study numbers and differing geographical locations of study populations. This leaves purchasers, producers and their consulting veterinarians relying on clinical expertise when there is a lack of evidence-based information to guide decision-making.