Plumb defects, which are in particular misalignments of the various bone segments, are manifested in adult horses by deviations such as splayed feet, panniers or angular deformities of the joint spaces in valgus (deviation towards the outside) or varus (deviation towards the inside), or by rotations in the axis or deviations in the sagittal plane.
These plumb defects are often accompanied by postural defects.
These anomalies are partly linked to genetic factors.
For example, heavy horses, with their broad chests, are more likely to be lop-sided, while Thoroughbreds, which are narrower, are more likely to be plumb. Certain breeds, such as Iberian horses, are distinguished by straighter feet, particularly when the sagittal angle (pastern-foot axis, seen from the side) is observed. However, these characteristics are not universal, and there are always exceptions.
The environment and sports or leisure use also play an important role, and unsuitable flooring or inadequate management of living conditions can accentuate these anomalies.
If left unchecked, these defects can have significant repercussions.
Foot hygiene (fork and white line) is very important, as in some cases it degenerates into foot pathologies (toad and ankle problems).