Developmental aspects of distal limb conformation in the horse: the potential consequences of uneven feet in foals.

The research article investigates how the distal limb conformation – an aspect related to the performance and soundness of a horse – develops in foals, and the potential impact of uneven feet on this development.

Study Methodology

• A total of 23 Warmblood foals were involved in this study, focusing on the conformation of their distal front limbs.
• The conformation was scored visually and measured using radiographs when the foals were 27 weeks old and then again at 55 weeks old.
• Pressure measurements were also taken under both front feet of the foals at these same ages.

Study Findings

• The radiographs revealed a backwards-broken hoof-pastern axis at both ages, however, this was only occasionally recognised visually.
• Over time, the hoof angle was found to decrease while the angles of the dorsal and solar surfaces of the distal phalanx (P3) increased.
• The parallelism between the hoof wall and P3 improved with time.
• Foals with uneven feet at 27 weeks of age showed a significant difference in distal limb loading that continued until they were 55 weeks old.

Study Conclusions

• In a six-month period, the alignment of the distal limb in the sagittal plane increased; however, this was often not observed during visual assessment.
• The growth processes in the distal limb couldn’t compensate for existing unevenness, resulting in ongoing asymmetrical limb loading.
• Foals’ distal limb conformation differs from that of mature horses. This variation must be considered when interpreting related radiographs.
• Foot unevenness resulted in asymmetrical loading of the proximal and distal interphalangeal joint, possibly leading to a higher susceptibility to overload injuries and decreased performance as the horse matures.