The 2 BYFs. The one on the right looks a teensy bit taller but she has a few talons on the edge of the box. I would say they're the same size.

Whatcha doing up there Mom?

3rd breakfast has arrived!

Feeding chart week 4! We had a couple of self feedings too!

Good thing the one in the poop deck was laying down!

Look at those wings!

Girl, boy, girl?

Looks like their masks may be different. Far right has more light colored feathers showing. I hope that holds true!

Girl, boy, girl?

If they stay looking like this we could probably tell them apart.
Left to Right:
Oldest, Youngest, Middlest?

Agreed. I had thought BBF was first hatched when he was the first to wander away from the fluff pile into the corner.

The 2 BYFs look just about the same size here.

I'm thinking 2 girls and BBF is a boy. BBF looks smaller in this pic...starting to lose the fluff factor. The one on the left is still flat on it's haunches but the feet look about the same size as th middle one.

Visitor at the Powers nest box   

Not all 3 in a line but it looks like Blue feet has thinner legs than the one beside it.

4th breakfast and the whole family in view!