Most likely Brahmas as Cochin peepers look a little different, although both have feathered legs. I love the Cochins; looks like they're wearing feathered pantaloons!
I do have to say though, that I'm a big fan of Buff Orpingtons. Lovely, calm birds, especially the roos.
I have 3 RIR girls, and they're much more feisty than the Cochins or Orps.