I'd say those black and white ones you got seven of are barred plymouth rocks! They're ALL just adorable. Glad you gave the little pecked one a friend! Enjoy those babies!!!!
Um... what is an EE? I know, probably a stupid question
I looked up the Plymouth's, you may have nailed it.
I looked closer and there seem to be two types of black chicks, ones with white bottom halves (little white butts) and ones that are mostly black with a white mark on the head ... hmm might havd two different kinds among the blacks.