I have 2 chicks. When they first hatched, I was sure 1 was a girl, 1 was a boy. The one w/ the black spot on her head has just always looked petite and delicate next to the fuzzy yellow chick. His legs were so big and thick when he hatched, I immediately said that one must be a boy. They're a few days old now and the "boy" still has bigger legs, his comb looks slightly bigger (but still tiny, barely a spiky ridge on his head), and his wing feathers are all short. The one with a black spot on its head still has skinny little toothpick legs (compared to the twigs the other has. lol), no comb to speak of, and her wing feathers have 2 rows, 1 short 1 long. These are my first chicks, got the parents as young adults. Sound right? They are so adorable!