These kids hatched on June 18. The chocolate duckling is supposed to be a girl. The other duckling is supposed to be a boy. My questions: 1. Is the "boy" a blue? We thought when he feathered out he'd be black/white. But his feathers are clearly not black. 2. Shouldn't I be seeing a size difference (leg and feet size) by now if I do have a male and female? 3. Does their amount of feathering appear normal? At what age should they be fully feathered? 4. Can you tell these are my first ducklings? Thanks in advance for any help you can give me.