Her immediate comment was "So he'll get mud fever on all of those!" I replied that he seemed fine, in fact, and then it occurred to me that actually I've not had a problem with mud fever in any winter since the horses went barefoot.
Bear in mind that of the horses here, Felix, Ghost, Angel and Bailey have 3 white legs each and Charlie has 4 white legs. Hector only has 2, but also has the thinnest, most sensitive skin you could hope to find.
It rains all year round, and although they always have the barn to get dry in, there is a LOT of wet ground, both where they live and where we ride. It can't just be that they can get dry in the barn, either, because most shod horses here are stabled at night over the winter, as mine used to be, and we used to have a problem with mud fever even in Hampshire, which was much drier than here.
I realised during our first winter barefoot that mud fever was much less of a problem in barefoot horses than shod horses, and clients reported the same, but because I hardly ever come across it now, I'd forgotten what an absolute pain in the backside it used to be, from this time of year onwards :-)