Need help figuring out what kind of surprise package chickens we got

Hi! I'm new here and thrilled to find this forum. We had chickens (barred rocks) almost 15 years ago but had to give them up to a farm. Now we have finally been able to get more chickens. We also wanted some turkeys and ducks as well so we ordered a mixed package but the problem is they didn't come with any information as to what kind they were. They were supposed to be brown egg laying pullets but after exhaustive searching on line and in books, we can't figure out what kind they are.

They are 7 weeks old now. They are all basically black with some white. Some look almost like barred rocks but they have black/slate colored legs and full black heads. Others only have one or two white spots on a few feathers. Two of them have solid white flight feathers but are black/ black and white otherwise. Their eyes are greenish and their beaks are either completely yellow or have black spots on them. They are now big enough that they are flying up on the four foot gate of our chicken pen.

The one with my daughter is the one with white wing feathers and was taken just two days ago. The other two pics are from a week ago or so. Any ideas?

 

Ok, everyone says barred rocks which is what we thought all along except that they have black legs. Our barred rocks last time had yellow legs and everything I've read and seen shows yellow legs as a distinctive marking of barred rocks. Any ideas as to why they don't have the yellow legs? And also why we have two birds with solid white feathers on the wings? These feathers are hidden when they don't have their wings spread out.