My friend was told the two larger reddish brown chicks were Columbian Rock Crosses by the Tractor Supply store they were purchased from. Could this be correct? From a quick look, I thought they were Rhode Island Reds. --- Thanks in advance.
(The others are Black Sex-Links, an Australorp and a Buff Orpington.)

(The others are Black Sex-Links, an Australorp and a Buff Orpington.)