What kind of chicken is this

Welcome to BYC!!! The darker red one in the back looks like a RIR.

 

The bird front and center looks to be a production red - much to light to be a RIR, the bird in the background (at the waterer/feeder) is more likely to be a RIR.

 

that looks like a female rhode island red but it might have a little bit of white leghorn in it

 

x2

 

The last shot appears to possibly show black feathering coming through in the tail - is that the case or just the way the picture looks?

ETA - you posted another picture while I was posting - this is in reference to picture in post 7