Last year we ordered 5 straight run Partridge Cochin hoping, for once to get a roo, because they are so gorgeous. I ended up with all pullets. Now this year I ordered assorted straight run banty chicks. I ended up with a good number of Partridge Cochins, but they all look alike to me! Most are 4 weeks old and one is six weeks old. Can you tell if I have all pullets again, all cockerels or mix?