Where did you get them from? That could help narrow down the possibilities. The reddish colored chick might be a red sex-link. The taller cream-colored chick looks like it may be the male offspring of the red sex-link cross. Those chicks have that creamy-yellow down and the males wind up light colored.
The black ones have pink feet so I am thinking Black Austrolorp for them.
Wanna trade?
I got what was supposed to be BA and they have yellow feet so I am going with JG on the ones I got.
Thanks. I didnt even think about Astralorp. Too bad we arent close enough to swap. It will be fun to watch them grow up and see what we have. I'm dying to get more.