10/22/2026
Hoof balance. Hoof angles. Compensatory patterns. It’s not a simple issue. It’s complex and far reaching for your horse
The old adage “no hoof no horse” From actual movement you can see to the subtle unseen.
Can changing hoof balance influence a horse’s autonomic nervous system state?
Edited for clarity on the photo context….
Look at these two photographs. What I find fascinating is not simply the difference in posture, which still requires work. But the remarkable change in this horse’s entire behavioural presentation following a relatively minimal farriery intervention.
Before intervention, this horse was virtually incapable of standing quietly. It was constantly shifting its limbs, repeatedly adjusting its position and invariably returning to abnormal compensatory postures. It appeared uncomfortable, distressed and unable to find a position in which it could settle.
The second photograph was taken almost immediately following intervention. The horse was now able to stand quietly, with a noticeably lowered head and neck, a softer demeanour and an entirely different behavioural presentation.
And this is where the discussion becomes particularly interesting!
Firstly, some important context. This is NOT a fully rehabilitated horse, nor are we presenting this as an example of perfect static posture. At this stage, we have undertaken relatively minimal intervention, primarily addressing grossly compromised dorsopalmar and dorsoplantar hoof balance, including negative palmar and plantar angles. Who knows what structural damage has been done with these long term issues.
There are still postural abnormalities present, and we would absolutely expect that! Longstanding compensatory strategies and musculoskeletal adaptations do not simply disappear following one intervention. The overreach boots visible in the second photograph were also applied simply to protect the newly fitted farriery package.
What we have potentially achieved is not the end point of rehabilitation, but the mechanical starting point that allows rehabilitation to begin.
And the immediate behavioural response is what I want to explore.
The hoof is not simply a mechanical structure. It is a neuro-sensory organ.
Through its interaction with the ground, the hoof contributes sensory information about pressure distribution, loading, deformation and stability. This information, alongside proprioceptive input from the rest of the limb, helps the nervous system organise posture and movement.
But there is another incredibly important component to this relationship.
Comfort!
We know that pain, postural control, sensory processing and autonomic nervous system activity are intimately connected. Persistent discomfort or instability can contribute to increased vigilance, protective muscle activity and sympathetic arousal.
Equally, reducing discomfort and improving mechanical stability may allow an animal to adopt a calmer behavioural state, with less need for protective postural strategies.
This is not simply theoretical speculation without a physiological foundation.
Dr Karen Gellman’s work on equine posture is particularly relevant here. Gellman and Ruina (2022) demonstrated through mechanical modelling that different standing postures impose substantially different requirements for active stabilisation. Their model predicted that a canted-in stance requires approximately twice the stabilising stiffness of a more vertical or slightly splayed stance.
Gellman’s wider work on postural rehabilitation also explores the relationships between sensory input, compensatory posture, musculoskeletal function, emotional state and autonomic regulation.
In my own published research (Sharp et al., 2022), we demonstrated that changing dorsoplantar hoof balance could significantly influence hindlimb posture.
So we have evidence that hoof balance can influence posture, and that different postural strategies carry different mechanical demands.
Now consider the potential neurophysiological implications.
If a horse is persistently experiencing abnormal loading, discomfort or mechanical instability, the nervous system may continually respond through protective muscular activity and heightened arousal.
Those responses can themselves alter posture, which subsequently changes how the hooves are loaded.
A potentially self-reinforcing relationship between hoof mechanics, sensory feedback, postural compensation and autonomic state!
By changing the three-dimensional spatial balance of the hoof, we can alter the mechanical environment in which the horse operates. We can influence pressure distribution, joint moments and the sensory information associated with ground contact.
And if those changes reduce discomfort or the need for protective muscular activity, it is physiologically plausible that they may also influence autonomic regulation.
Which brings us back to this horse.
The remarkable observation was not that we had instantly corrected every postural abnormality. We clearly hadn’t!
It was that a horse previously unable to stand quietly appeared to find comfort and stability almost immediately following a relatively limited mechanical intervention.
The lowered head and neck are not being presented as proof of perfect biomechanics. They are part of a wider behavioural change, alongside the horse’s newfound ability to settle.
This response is consistent with a possible reduction in sympathetic arousal and a shift towards a calmer autonomic state. Of course, confirming that would require physiological measurements such as heart-rate variability. But the observation is entirely worthy of investigation.
And there is another important aspect to this particular case.
This horse was treated collaboratively by myself and Celeste. The farriery intervention addressed the mechanical conditions at the ground interface, facilitating the body changes Celeste was able to work towards through her intervention.
The two approaches complemented one another, and together we observed a remarkable change in the horse’s presentation.
This is precisely why I emphasise the bidirectional relationship between hoof balance and whole-body posture.
The hoof influences how the horse organises itself, while the posture of the horse influences how the hoof is loaded.
If we continue to leave the horse operating upon a mechanically compromised foundation, we may perpetuate the very compensatory strategies we are attempting to rehabilitate.
Equally, correcting the mechanical foundation does not automatically resolve the adaptations that have developed throughout the rest of the body.
The objective is to create the conditions in which meaningful rehabilitation becomes possible.
And this is where I think our understanding of hoof balance needs to evolve.
Balance is not simply about achieving a particular hoof angle, making the limb appear perpendicular to the ground or producing an aesthetically pleasing static stance.
Within the principle of 3D spatial balance, we are considering the spatial relationships between the internal anatomy, the hoof-ground interface and the forces acting upon the limb, alongside the consequences these relationships have for the horse as a whole.
We must also distinguish between an immediate functional response and a successful long-term rehabilitation outcome. The latter requires continued observation, objective assessment of posture and movement, and evidence of sustained improvement.
These photographs are not intended to demonstrate a finished rehabilitation. They document an immediate response that raises a much more interesting question.
If changing the mechanical and sensory conditions beneath a horse’s feet can coincide with such a profound change in its ability to stand comfortably and calmly, what does that tell us about the relationship between hoof balance, proprioception, nociception and autonomic regulation?
Many people want to challenge the principles of 3D spatial balance, and I welcome that. But we must also be willing to investigate the whole-horse responses we observe rather than reducing every discussion to whether a limb appears perfectly aligned in a photograph.
Because sometimes the most interesting consequence of changing hoof balance is not what happens to the hoof.
It’s what happens to the horse!
References
Gellman, K. & Ruina, A. (2022). Standing horse posture: a longer stance is more stable. Biology Open, 11(4), bio059139.
Gellman, K. (2015). Normal and abnormal equine posture: how PRI can help performance and health. IVC Journal.
Sharp et al. (2022). An Investigation into the Effects of Changing Dorso-Plantar Hoof Balance on Equine Hind Limb Posture. Animals, 12(23), 3275.
Bowker, R.M. (2012). The Horse’s Foot as a Neurosensory Organ: How the Horse Perceives its Environment. In Care and Rehabilitation of the Equine Foot.
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