White line disease: A review (1998–2018)
Authors: O’Grady S. E., Burns T. D.
Journal: Equine Veterinary Education
Summary
# White Line Disease: A Review (1998–2018) White line disease remains one of the most vexing conditions encountered in equine practice, largely because its aetiology is poorly understood, diagnosis is inconsistent and treatment protocols lack scientific validation. O'Grady and Burns synthesised two decades of veterinary literature alongside their extensive clinical experience to examine the pathological mechanisms, clinical presentations and management strategies for this condition. The research revealed that white line disease exists on a spectrum—ranging from minor hoof wall separation to severe disruption of the dermal–epidermal interface with potential displacement of the distal phalanx—yet no universally accepted diagnostic or definitional criteria exist within the profession. Whilst numerous topical treatments and preparations have been advocated over the years, few are supported by robust evidence, and most remain contentious amongst practitioners. For farriers, veterinarians and allied professionals, this synthesis underscores the importance of reverting to sound mechanical principles (conventional farriery) rather than relying on unproven remedies, whilst highlighting critical gaps where future research into causative factors and evidence-based interventions could meaningfully advance clinical outcomes.
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Practical Takeaways
- •White line disease requires careful hoof examination to identify the extent of lamellar separation—don't rely solely on superficial appearance to determine treatment strategy
- •Most commercial WLD treatments lack solid evidence; focus on mechanical debridement and proper hoof management rather than topical agents alone
- •Collaborate closely between farrier and veterinarian since successful cases in practice have used conventional farriery alongside veterinary management
Key Findings
- •White line disease lacks a definitive definition and becomes clinically apparent only when hoof wall compromise, capsule distortion, or lameness is evident
- •Clinical presentation ranges from minor hoof wall separation to extensive disruption of external laminar bond with distal phalanx displacement
- •Most proposed treatments and topical preparations lack scientific documentation or evidence of efficacy despite widespread use
- •Conventional farriery approaches have produced successful outcomes in the authors' combined clinical practices