I think it's a single comb, although of course it's hard to tell on tiny chicks that don't want to allow close-up pictures. I'm sure it's not a rose comb, but I can't be positive about whether it's a pea comb.
I agree that it's probably a Partridge Cochin.
It looks like a single to me too, but the head is blurry in all the photos. I think I see a little comb in the first pic, I'm not certian though.