North American Veterinary Licensing Examination (NAVLE) Practice Test 2025 - Free NAVLE Practice Questions and Study Guide

Ingestion of a large amount of grain in horses poses a significant risk for developing laminitis. This condition is characterized by inflammation of the laminae, which are the sensitive tissues connecting the hoof wall to the underlying structures. Rapidly fermentable carbohydrates found in grains can lead to an overgrowth of lactic acid-producing bacteria in the hindgut, causing a rapid drop in pH and resulting in acidosis.

When acidosis occurs, it can disrupt the blood supply to the laminae and initiate inflammatory processes that lead to laminitis. The affected horse may present with signs such as shifting weight, reluctance to move, and a characteristic stance that involves leaning back on the hind legs.

While torsion, impaction, and acidosis are serious conditions, they are not as immediate a concern in the context of grain overload as laminitis. Prompt recognition and intervention are crucial to prevent irreversible damage to the hoof structure associated with laminitis. Effective management strategies may include removing access to grain, providing supportive care, and monitoring for signs of this serious condition.