The one you think might be barred rock is one I’m confused about. I have 4 that look the same. However, 2 have the yellow legs, while 2 have more of a light pink legs.So here are some breed guesses:
1st row
pic 1
black australorp, blk orpington, or blk sex link top left
with a Rhode island red or hybrid of a rir like isa brown, cherry egger, etc. top right
chipmunk chick in center has belly like a cream legbar, welsummer, or brown leghorn
the two multitone gray chicks have "cheeks" (muffs) like Easter Eggers/ olive eggers
pic 2
Easter Egger (EE)
pic 3
Rhode Island Red (RIR) or hybrid RIR
2nd Row
pic1
pic2 Legs are feathered so perhaps marans (is this same chick?
pic3 at least 3 of them have the cheeks of EEs
3rd row
pic 1
blue or lavender Amerucana (or EE) Either way very pretty female
Pic 2
The one in back may have feathered legs and muffs - so could be an olive egger.
Pic 3
The black and white striped is a Barred Rock
Light chick is an Easter Egger
black chick is black australorp, blk sex link or maybe blk orpington