hen or too? 3 silkies (box said girls)

[Roguecherry]

b1 we can't see her eyes much
b2 had a broken beak that has been glued (not by me)
b3 is he smallest and from same set of eggs,
the man had all the birds in boxes according to size and sex
he also had a box off smaller birds that said 'we think boys but not 100%' and a box saying same but for girls
we think age is 4 month

 

[pineapple416]

I think bird 3 is a boy, bird 2 is a girl, but not sure on bird 1