Strategic palmar trimming before conventional shoeing shows potential for managing underrun heels in horses.
Authors: Poochipakorn, Sanigavatee, Wonghanchao, Huangsaksri, Chanda
Journal: F1000Research
Summary
# Editorial Summary: Strategic Palmar Trimming for Underrun Heels Underrun heels remain a persistent source of poor performance and hoof imbalance in horses, with existing corrective shoeing protocols delivering inconsistent results. Researchers in this 2024 study compared eleven horses (14 hooves in the control group, 16 in the experimental group) over 30 weeks, measuring dorsal hoof wall angle, heel-bulb distance, and solar surface dimensions at five-weekly intervals to evaluate whether strategic palmar trimming prior to conventional shoeing could improve hoof conformation compared to standard trimming protocols. Meaningful changes in hoof architecture—including reduced heel-bulb distance, decreased dorsal hoof wall angle-to-heel angle ratios, and increased palmar width—emerged only in the experimental group, specifically between weeks 25 and 30, suggesting that structural remodelling requires a sustained and consistent trimming strategy rather than immediate correction. For practitioners managing chronic underrun heels, this work indicates that a targeted palmar trimming approach before shoeing warrants consideration as part of a long-term rehabilitation plan, though the delayed response timeline means clients should anticipate several months of consistent application before expecting measurable improvements in hoof conformation. The differential effects between groups suggest that trimming philosophy and execution substantially influence outcomes, making protocol selection and client compliance critical factors in managing this common conformational problem.
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Practical Takeaways
- •Strategic palmar trimming before conventional shoeing may offer a more effective alternative to standard trimming protocols for horses with underrun heels, though results require 25-30 weeks to manifest.
- •Standard corrective shoeing without strategic palmar preparation appears ineffective for managing underrun heels based on this trial, suggesting farriers should consider modifying their trimming approach.
- •Implementation of this protocol requires commitment to consistent application over an extended period (at least 6 months) to observe measurable hoof conformation changes.
Key Findings
- •Strategic palmar trimming before conventional shoeing produced significant modifications in hoof conformation at 25-30 weeks, including decreased DHWA/HA ratios and heel-bulb distance in the experimental group only.
- •Control group receiving regular trimming before traditional shoeing showed no significant hoof conformation changes over the 30-week period.
- •Experimental group demonstrated increased palmar width of trimmed hooves coinciding with decreased palmar trimming distance, suggesting progressive hoof adaptation.
- •Group-by-time interaction was observed for DHWA/HA ratios and solar surface dimension, indicating different trimming protocols produce different effects on hoof conformation.