A reduction in lesion score was seen for both footbath products, but feet bathed in 5% copper sulphate improved more (OR = 1.6, CI: 1.14–2.32; P < 0.01), and, irrespective of solution, there was a significantly greater improvement in those herds where two footbaths were used (OR = 3.39, CI: 2.07–5.19; P < 0.001). Lesion improvement over time also increased with lactation number (OR = 1.13, CI: 1.02–1.25; P < 0.05