Which gait is characteristic of a horse with stringhalt?

The gait characteristic of a horse with stringhalt is the abnormal jerky hyperflexion of the hock. This condition is most noted for causing a distinctive, exaggerated flexing at the hock joint during movement, particularly when the horse is exercised or walking.

In stringhalt, the hyperflexion disrupts the normal rhythm of the horse's gait, leading to a jerky appearance that is quite different from typical movement patterns. Observing the horse, one can see that the hock elevates higher than normal as the horse moves, causing a sudden and abnormal flexing motion. This characteristic helps differentiate stringhalt from other lameness conditions, which often present differently, such as through consistent limping or other less dynamic movements.

Each of the other options presents different clinical signs that can be associated with various other conditions affecting horses. For example, ataxia and circumduction are typically associated with neurological issues, while non-weight bearing lameness often indicates significant pain or trauma. The rear foot jerking caudally prior to ground contact might be observed in other gait disorders but is not specific to stringhalt. Thus, the distinct jerky hyperflexion at the hock distinguishes stringhalt clearly among other potential gait abnormalities.