Effects of housing and intake of methionine on the growth and wear of hoof horn and the conformation of the hooves of first-lactation Holstein heifers.
Authors: Livesey C T, Laven R A
Journal: The Veterinary record
Summary
# Editorial Summary: Housing and Methionine Effects on Hoof Growth in Dairy Heifers Livesey and Laven (2007) compared three housing systems and methionine supplementation in first-lactation Holstein heifers to determine their effects on hoof horn growth, wear rates, and foot conformation during early lactation. Post-calving hoof horn growth increased significantly across all groups, yet wear rates remained unchanged—a mismatch that altered hoof conformation, particularly increasing toe angle and bearing surface width, likely from heel bulb hypertrophy when animals transitioned from soft to concrete surfaces. Housing type proved immaterial for growth rates, but straw yards substantially reduced lateral horn wear compared to both cubicle systems, regardless of mat thickness or rubber filling. Methionine supplementation at 115 per cent of recommended requirements produced no measurable effects on either growth or wear dynamics. For practitioners managing periparturient foot health, these findings suggest that housing surface type—particularly straw bedding's protective effect on lateral wall wear—warrants greater attention than micronutrient supplementation strategies, whilst monitoring for conformational changes during the transition to concrete flooring remains clinically important.
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Practical Takeaways
- •Housing surface transitions (soft to concrete) during early lactation trigger hoof conformation changes; straw-bedded systems reduce lateral horn wear compared to rubber-matted cubicles
- •Methionine supplementation does not improve hoof horn growth or wear characteristics in first-lactation heifers, suggesting other nutritional or management factors are more critical for hoof health
- •Monitor hoof conformation changes carefully after transition to concrete housing, as heel bulb hypertrophy may develop independently of growth rate imbalances
Key Findings
- •Hoof horn growth rate increased significantly after calving, but wear rate did not increase correspondingly
- •Housing type did not significantly affect hoof horn growth, but straw yards resulted in significantly lower lateral horn wear compared to cubicles
- •Changes in growth and wear rates resulted in altered hoof conformation including toe angle and bearing surface width, suggesting heel bulb hypertrophy occurred when heifers transitioned from soft to concrete surfaces
- •Methionine supplementation at 115% of estimated requirements had no significant effect on hoof horn growth or wear rates