So, first off, always confer with your lee on what he or she is comfortable with. Then consider how ticklish your lee is. Some lees are not "feather sensitive" while others and insanely sensitive to tickling.
As for feathers, I'd try looking into the following:
Static dusters as well as a Go Duster (which can be bought on Amazon).
High gram chandelle feather boas and high ply ostrich feather boas can be expensive but yield impressive results.
A machine buffer (the type they use on cars) with a fluffy wool pad can work extremely well on feet but keep in mind that this can build up friction and heat so it might be a good idea to use it in increments.