Do you have feather-footed chickens?
Just over half of my current flock is feather-legged, 37 out of my current 70 birds.
Do you have to do any special management of the feathered feet? Why or why not?
Nope. They live in the same pens, eat the same food and drink the same water out of the same dishes, have the same bedding and roost setups provided, etc. I've never seen a need to do any differently.
What kind of soil do you have?
Near the coop it's clay soil that is a muddy, sloppy mess in late winter-early spring and then is mostly solid the rest of the year as long as we don't have endless rain like last summer. Further out where they free-range is more rich, forest floor soil covered in fallen leaves.
Have you had any issues with mud collecting on the foot feathers?
No issues, but it does get in their foot feathering. My clean legged birds also get mud caked on their legs when it's at its worst. It never causes problems for either and crumbles off once dry.
Have you had any issues with ice collecting on the foot feathers?
Most of my birds refuse to walk on snow, but the few that do can get some snow caught up in their foot feathering. However, it always falls out almost immediately once they go back inside and start scratching around their bedding. It doesn't collect in their feathering when they walk on the paths I tread down or shovel for them, only in the deeper snow.
Have you had any other issues with foot feathers?
The occasional broken feather that bleeds, and it seems like the more densely feathered legs like on the Cochins can have somewhat brittle and stunted outer toenails on both feet that can break and bleed, but not with enough frequency to be an actual problem. When I get a little lazy and let a coop go too long without cleaning, poop can collect in their foot feathering, but it doesn't cause an issue unless ignored for long enough to really build up and it also usually crumbles out once they're on clean litter again.
I will say that by fall, just before molt, their foot feathering usually looks pretty worn out and ratty. That's not an issue to me, personally, but others might find the look less appealing.