Help with breed

[rytycatemom]

Hello--We got 6 chicks from the local grade school after they hatched eggs. 4 yellow hatched from white eggs and 2 all black hatched from brown eggs. I am pretty sure the yellow chicks are while leghorns, but I have no idea what the black ones are and neither did the teacher. Any ideas?

 

[ljf24]

my black sex-links hatched from brown eggs