They are 10 days old. All have feathers on feet other than one.
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Your pictures make it very hard to see them, but we can narrow down the possibilities. They are not going to be any variety of silkie because I don't see any black faces, and there are only so many breeds of feather-legged bantams. I would bet they are going to be a variety of d'Uccle, Cochin, or Brahma. Judging from what coloring I can see I would narrow them down to Black Mottled D'Uccle, Silver Laced Cochin, Mottled Cochin, Blue Cochin, Dark Brahma, or Partridge Cochin. I cannot see the non-feather legged one so I have no idea what he might be.
Could you get better photos?