Effects of housing, parturition and diet change on the biochemistry and biomechanics of the support structures of the hoof of dairy heifers.
Authors: Knott L, Tarlton J F, Craft H, Webster A J F
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary Knott et al. (2007) examined how housing conditions, the metabolic demands of pregnancy and lactation, and dietary changes influence the structural integrity of the bovine hoof, particularly in the laminar and connective tissue that anchor the distal phalanx. Using maiden, pregnant and lactating dairy heifers, the researchers assessed sole lesion severity, laminar morphology, connective tissue biochemistry and biomechanical properties, finding that whilst no animals developed clinical lameness, cubicle housing and the periparturient period independently increased sole lesion severity by approximately 50–80%, with effects compounding when both stressors were present. Both cubicle confinement and parturition altered connective tissue metabolism and composition, reducing the tissue's ability to absorb mechanical stress—a finding the authors attribute to the metabolic remodelling demands of pregnancy and lactation rather than to changes in feed composition. The practical implication is significant: targeted improvements to housing and management during the transition period around calving, implemented at minimal cost, may substantially reduce heifer lameness by mitigating cumulative structural strain on already-compromised hoof tissues at their most vulnerable phase.
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Practical Takeaways
- •Improve housing conditions around the time of calving—even short-term, low-cost husbandry improvements in cubicle systems can significantly reduce heifer lameness by reducing stress on compromised feet
- •Recognize that parturition causes temporary weakening of hoof connective tissue resilience; manage environmental stresses (flooring, housing type) particularly carefully in pregnant and newly lactating heifers
- •Diet manipulation alone will not address parturition-related hoof problems; focus management efforts on housing quality and biomechanical support rather than nutritional interventions
Key Findings
- •Sole lesion severity was significantly greater in heifers housed in cubicles versus straw yards, with additive effects when combined with parturition/lactation status
- •Cubicle housing and parturition each increased connective tissue metabolism and altered composition, with additive effects on both factors
- •Parturition/lactation caused non-inflammatory connective tissue changes that impaired biomechanical resilience of the hoof to external stresses
- •Diet change had no significant effects on hoof biochemistry, biomechanics, or sole lesion development