Determination of Positional Parameters of the Distal Phalanx Within the Hoof Capsule in Sound Colombian Paso Horses.
Authors: Cardona Guillermo A, Uribe Andrea, Ortved Kyla
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Distal Phalanx Positioning in Colombian Paso Horses Colombian Paso Horses are gaining economic and international prominence, yet fundamental knowledge about their hoof anatomy remains sparse—creating a genuine clinical need for breed-specific reference data on distal phalanx (DP) positioning to establish normal baselines and identify pathology. Researchers obtained latero-medial radiographs from 45 sound horses aged 3–5 years, stratified by gait classification, and measured three angles and three distances of DP positioning, dorsal wall thickness (proximal and distal), and sole depth (dorsal and palmar/plantar). Notable findings included moderate to strong positive correlations between proximal and distal wall thickness in front feet (r = 0.53) and hind feet (r = 0.61), plus consistent sole depth correlations across both digit pairs (r = 0.71–0.72); crucially, hind feet demonstrated significantly flatter distal phalanx angles and reduced sole depth compared to front feet—a pattern differing from other horse breeds examined to date. For practitioners working regularly with this breed, these measurements provide the first evidence-based reference points essential for evaluating whether individual horses' hoof radiographs fall within normal parameters, thereby informing farriery decisions and lameness investigations specific to Colombian Paso Horse anatomy rather than relying on data derived from other breeds.
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Practical Takeaways
- •Farriers and veterinarians working with Colombian Paso Horses now have breed-specific baseline measurements for assessing normal hoof conformation and detecting pathological changes
- •The flatter distal phalanx angle in hind feet versus front feet should inform breed-specific hoof trimming and shoeing protocols for this gaited breed
- •Understanding these breed-specific parameters helps differentiate between normal anatomical variation and clinically significant hoof problems that may affect the gait quality or soundness
Key Findings
- •Dorsal wall thickness showed moderate to strong positive correlations between proximal and distal measurements in both front (r=0.53) and hind feet (r=0.61)
- •Sole depth demonstrated strong positive correlations between dorsal and palmar/plantar measurements in front (r=0.72) and hind feet (r=0.71)
- •Distal phalanx in hind feet is flatter (larger palmar/plantar angle) compared to front feet in Colombian Paso Horses
- •Colombian Paso Horses show different positional parameters of the distal phalanx compared to other horse breeds