03/24/2026
If you’re not assessing HPA as part of your process, it may be time to start.
One of the best benchmarks for our trim/shoeing work is observing the Hoof-Pastern Axis (HPA) of the horse's distal limb. It reflects how the horse's body is being supported through the legs to the hoof and the ground, in response to gravity. Hoof, distal limb, and leg are working together under load.
When the HPA is off, broken forward or broken back (see the included image for reference), the horse doesn’t just “look different”—it compensates. That compensation can lead to strain, altered movement, and eventually pathology.
Using HPA as a benchmark helps shift us out of aesthetic trimming and into functional decision-making:
How is the ground surface of the foot supporting the leg and whole horse?
Where is the load going?
How can we better support alignment?
Keep in mind, HPA isn’t something we force. It’s something we work toward, respecting the horse’s current structure and capacity for change, influencing the HPA with our trim and, if needed, shoeing decisions.
Remember, hoofcare isn’t about creating a picture—it’s about improving function and supporting the horse's soundness today AND over time.
