Mange caused by the Sarcoptes scabiei mite causes severe suffering in urban fox populations, and voluntary treatment programs run by wildlife rehabilitators offer one of the most direct welfare interventions available.
Mange is one of the most welfare-relevant wildlife diseases in urban environments because it is both common and treatable. An untreated mangy fox suffering through a winter is experiencing months of intense dermal discomfort, increasing weakness, and behavioral impairment before death. Treatment programs using medicated bait stations have demonstrated effectiveness at both treating individuals and reducing local outbreak prevalence. The relatively small cost of treatment bait compared to the welfare benefit to multiple animals makes mange intervention one of the highest-value wildlife welfare actions available to motivated individuals.