gritsar, thanks for re-posting that info; I had copied it off one of your other posts and I can't remember where I put it.
Very helpful.
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His stance is a little different from the others. His comb is slightly larger and pinker (from what I can see in the pics). He has thicker legs and he's not feathering out the same; he's still pretty bare across the wing bows. The wing bows are the rounded part of his wings i.e., his shoulders.
ETA: For future reference:
According to UC Davis Veterinary Care Program.
2. Physical Characteristics (4-6 weeks of age)
a. Comb The cockerels comb is medium size and pinkish, the pullets is small and yellowish.
b. Legs The cockerels legs are sturdy and long, the pullets are finer and shorter.
c. Tail The cockerels tail is stumpy and curved, the pullets is longer and straight.
d. Back The cockerel has a thin line of stub feathers down the center of his back, the pullet has more advanced feathering along the center of her back.
e. Side of neck, flank and crop The feathering in the cockerel in these areas is poorly advanced, the pullets feathering in these areas is well advanced.
f. Wing bows In the cockerel the wing bows are bare, in pullets the wing bows are covered with small feathers.