Measuring hoof horn haemorrhage in heifers: A history.
Authors: Laven Richard, Laven Linda
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary: Measuring hoof horn haemorrhage in heifers Research into claw-horn disease (CHD) in cattle has increasingly focused on hoof horn haemorrhages—particularly white-line and sole haemorrhages—as these lesions are critical precursors to clinically significant conditions such as white-line disease and sole ulcers, making them valuable markers of early pathological change. By studying late-pregnant and early-lactation heifers (animals with minimal prior claw damage but exposed to the same risk factors as lactating herds), researchers since the early 1990s have established a robust prospective framework for investigating CHD aetiology without the confounding effects of previous foot damage. The field has evolved methodologically over this period: whilst early work prioritised measuring lesion severity alone, contemporary best practice combines both severity and extent into integrated scoring systems that capture the full picture of haemorrhage burden. Key findings from these heifer studies have substantially advanced understanding of CHD—most significantly demonstrating that the transition period around parturition represents a critical vulnerability window, that housing conditions exert major influence on lesion development, and that post-calving nutrition carries less influence than previously thought. Despite the proven value of this research approach, prospective heifer studies have declined in recent years; however, given evidence that fundamental questions about CHD pathogenesis remain unanswered, renewed investment in this methodology could substantially benefit herd health management strategies across the industry.
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Practical Takeaways
- •Monitor hoof horn haemorrhages in young cattle around parturition as early warning signs of claw-horn disease development, enabling preventive intervention before lesions progress
- •Prioritize housing quality and design as a primary control strategy for claw-horn disease prevention, as this emerges as more influential than nutritional adjustments post-calving
- •Use comprehensive assessment methods that evaluate both the severity and extent of haemorrhages rather than single metrics, for more accurate evaluation of claw disease risk
Key Findings
- •Hoof horn haemorrhages are precursors to and predictors of white-line disease and sole ulcer in cattle
- •Prospective studies in heifers have demonstrated the critical importance of parturition as a risk factor for claw-horn disease
- •Housing emerges as a significant risk factor for claw-horn disease, while post-calving nutrition shows relatively low importance
- •Combining severity and extent measurements in a single measure provides the best assessment of hoof horn haemorrhages compared to measuring severity or extent alone