D'uccles usually grow feathers on their feet. It's perfectly normal for the breed.
For most feather-footed chickens, the foot feathers do not cause any major problems.
I'm not sure that trimming would help anything, but if you want to try: don't cut any blood feathers (ones that are still growing have blood in them, and if you cut them they bleed quite a bit.) For any feather that is done growing, it should be safe to cut it as as short as you want. Of course, be careful not to cut the skin of the chicken. There will still be a short piece of feather there until the next time she molts. When she does molt, all the cut-short feathers will fall out and new ones will grow in their places.
If just one or two feathers cause trouble, you could maybe pluck those particular feathers. They would be completely gone for a short time, and then new ones would grow in the same place. Plucking feathers may cause pain to the bird, while cutting feathers should not cause any pain.
I don't know anything about perosis, so no advice there.
