Not quite.
Chickens are either silver based, or gold based.
You must have some silver based hens. White Rocks, maybe, or Delawares, something like that. I'm not thinking a regular barred Rock would produce a son like that no matter what you crossed her with.
A gold based rooster ( you said the father is a Red) crossed with a silver based hen would give sex linked offspring. Males would be silver, females would be gold.
Your red sex link hens could not be the mothers of these chicks, if the father is indeed a RIR.
If you want us to try to narrow down who the momma is, post pics of the rooster and the hens that are contenders.
Chickens are either silver based, or gold based.
You must have some silver based hens. White Rocks, maybe, or Delawares, something like that. I'm not thinking a regular barred Rock would produce a son like that no matter what you crossed her with.
A gold based rooster ( you said the father is a Red) crossed with a silver based hen would give sex linked offspring. Males would be silver, females would be gold.
Your red sex link hens could not be the mothers of these chicks, if the father is indeed a RIR.
If you want us to try to narrow down who the momma is, post pics of the rooster and the hens that are contenders.