Please use this photo to refer to the other chicks also. Number chicks 1-6 from left to right. Chick 6 is almost 4 weeks old. Father is BR, mother is Americauna with wheaten/blue/lacing features. I think he's male because #3 is so much smaller but hatched from same parents on same day. Feather development is advanced. Comb has 3 rows. Closeups below: #6 is top right #6 on the right, #3 on the left.