Hi again. Here is a photo from today, my chicks are two weeks old. I now think that the tree bantams might be either Orpington or austalorp. They are single-combed (although of the three, one had an orangish comb at hatch and the other two had black), are smooth legged with black on the legs and yellowish on the feet. I noticed that their first wing feather is white, the rest are black.
I have no clue yet about the full-sized one that had the chipmunk markings.