Figuring out breeds

[FarmInProgress]

Hi I have quite a few hens That are mixed breeds and some that are not mixed I believe. I know a couple of them but I just want to double check. If you could help me that’s awesome no worries if you can’t...thank you!

 

[DucklingLover232]

#1 Plymouth Rock #3 amber white

 

[chrissynemetz]

I kinda think they might all be mixed breeds. How old are they?
It's a beautiful flock btw!!

 

[FarmInProgress]

Thanks they most of them just started laying but the oldest one the silver one is 3 yr I thinks the rest are one and under

 

[NatJ]

#7 looks like a Dark Cornish (hatchery quality, not the show type with a super wide body.)