4.6. Data set DData set D was gathered by a hoof trimmer using the treatmentlist located in the fourth tab of the web-based app. The treatmentlist supplies a cow’s Cow Type that helps with prognosis and deci-sions such as breeding and culling. It is to be expected based onclinical expertise that cows with repeated M2 lesions have worseprognoses than cows without repeated M2 lesions. This data setalso illustrated that future predictions of M-stage proportions canhelp to support the need to intervene or to continue with a pre-ventive hoof bathing protocol by showing significant effects (e.g.,rise in the proportion of M2 lesion and hyperkeratotic lesions) ear-lier than by using observational data alone. In this case, predictionshelped to alert the hoof trimmer and herd manager regarding apotential outbreak and to draw attention to an increase in signs ofchronicity before they occurred. The prediction tool allowed themto justify the increase of topical treatment efforts.