A history of lameness and low body condition score is associated with reduced digital cushion volume, measured by magnetic resonance imaging, in dairy cattle

Claw horn lesions (CHL) are the result of a failing functional anatomy hoof in dairy cows. The digital cushion is understood to be vital structure prevention CHL. have previously been shown lead pathological change pedal bone; however, their effects on unknown. primary aim this study was examine associations between history CHL through an animal's life and at slaughter using magnetic resonance imaging. retrospective cohort resulted scanning 102 pairs hindfeet, collected from adult Holstein cows culled research herd, 3-Tesla research-grade imaging scanner. Volume fat measurements were calculated for each within claw modified Dixon Quant sequence. Animal-level variables constructed around animals' lactating lifetime, with lameness scores body condition score least every 2 wk. combined volume lateral claws used as outcome variable multivariable linear models. negatively associated number events or recorded. Furthermore, animals >3, later lactation, greater weight more likely higher claws. We propose that observations made current range factors broadly genetic, developmental, disease-related inputs. Our understanding how we can select genetically robust precondition before first calving needs improved reduce risk future cattle. optimal treatment regimens effect may recurrence lactation lactations.