The black ones look like they could be either Black Jersey Giants, or Australorps to me. Both breeds have the dark legs, but the Jersey Giant has yellow feet and the Australorp has a more pinkish color feet. So my guess, from your pics, is that they are Jersey Giants.
Oh no, I live on the opposite coast as you. LOL! I'm in the Poconos, in Pennsylvania. I went to the one in Broadheadsville. I guess they have the same chicks at every store huh?
I just bought 6 of them last night from Tractor Supply myself, and it had the same sign....Red Pullets. They also had another bin with "Assorted" Pullets, I stayed away from that bin because I had no idea what was in that mix. I figured I couldn't go wrong with the reds since they're all good...