My other buff orpingtons don't have the stripes on their back like that. That's why I wasn't sure in that one!
I've been stumped on the dark chick. Was a mystery chick from the hatchery. I will look that one up.
Never mind, barred Plymouth Rock is the same as barred rock. Like the others he is colored differently than the barred rocks I got in the same order, and it's smaller. His spot on his head is bigger and he has a white ring on his back, which the others do not have.