What breed is this?

[Clash3]

Hi, I'm new to being a ckicken "mom". I bought some chicks about 5 weeks ago at a bird auction. They are all heathy and thriving.
Anyway, I was told that half were Rhode Island reds, but the others are (the guy mumbled) ??? Does anyone know what they are? I would greatly appreciate it if someone tells me. 3

 

[HenHouse4Life]

looks like my Delaware

 

[RoostersAreAwesome]

Delawares

 

[Clash3]

looks like my Delaware

Thank you!

 

[Clash3]

Delawares

Thank you!

 

[drumstick diva]

Delawares

 

[Gray Farms]

Crossbreds. Not pure Delaware, but could be part.