Hey, MathAce.... I keep referring back to your BCM sexing study you did with all those gorgeous pictures. Did you ever organize them so that you can see the whole growing up process on another page? I'd love to see it.
Also, when you guess their genders in the beginning, were you doing it with feather sexing? If so, was it the primary/secondary feather technique, or comparing the line of feathers (i.e. the first 3 feathers or so stick out significantly longer than the rest)?
My BCM cockerel is a proud papa. We hatched out four chicks almost a week ago that have EE mothers. I gave them to my SIL, and I'm already obsessing on gender for her, since they can't have roosters. I'm trying to decide if feather sexing would be at all accurate, since they do have those EE genes in them, even though they look more BCM than EE.
Here's the chicks I hatched, since I love showing them off.
They are 3-4 days old here.
And just under 24 hours here: