Lameness prevention: from prevalence audits to a functional-trimming calendar

Lameness is still the most under-reported and most economically damaging welfare problem on modern dairies. Cross-country prevalence studies from the past decade repeatedly place mean freestall-herd prevalence between 20% and 35%, with the best-managed herds sitting near 10% and the worst above 50% (Cook et al., 2016; Thomsen et al., 2023).

Score before you trim

The Sprecher 1–5 locomotion scale remains the workhorse. Scoring every cow every four weeks as she exits the parlour, on a dry flat lane, produces a defensible prevalence figure and a working list for the trimmer. Farms that adopt this cadence typically see prevalence fall by 5–10 percentage points within two lactation cycles, largely by catching score-3 cows before they become chronic.

The lesion mix has shifted

The dominant claw lesions in most European and North American freestall herds are now non-infectious — sole ulcers, white line disease and toe lesions — with digital dermatitis a persistent second front. This shift, well-documented by Randall et al. (2019) and consistent with older work by Bicalho and Oikonomou (2013), means that footbath management alone cannot solve modern lameness; cushion and standing time have to be addressed in parallel.

A trimming calendar that holds

• Two whole-herd functional trims per lactation as the baseline, timed to dry-off and mid-lactation.
• Score-3 cows trimmed within seven days of detection, not at the next herd visit.
• Digital dermatitis lesions treated topically and re-checked within two weeks — never assume a single treatment resolves M2 lesions.
• Trimmer records fed back into herd software so lesion incidence is tracked, not just treatments.