They are ALL so pretty! Mystery would be solved if you could only catch the cockerel in the act! It’s tough to distinguish, I agree. My cockerel, Basil, showed behavior typical of a cockerel when all of mine were still the same size at about 12 weeks. He would quietly strut around watching the others. He was just different. Once they all got to be about 6 months, Basil began to grow larger than the girls, his tail filled out fluffier, and the lobes got a bit larger too. I love your photos!