If i have a big hunt coming up i use friars balsam get it off line i put it in a spray bottle and spray there feet 7 days in a row before i probably would use it as a preventative more than a cure though once the pads off i dont think there is a magic cure to grow it back in a week.
On a big hunt my mutts will catch 100+ pigs in a few days on hot unlevel ground friars keeps there pads on