Could it be the farm talked about in this article?
https://sbj.net/stories/eggs-on-a-m...thically-produced-eggs-from-springfield,62874
The photos at the top of that article include Red Sexlink hens. Red Sexlinks are a general type. They are sold as Golden Comets, ISA Browns, and many other names. But they are all hybrid brown-egg layers. They tend to have red feathers with some white in their tails and other areas. They usually have a Rhode Island Red father, and often a Rhode Island White mother. Their brothers (males) would be mostly white, with some red leaking through in the shoulders and other areas.
If the farm has Red Sexlink hens, and is not trying to produce eggs for hatching, the most likely roosters would be mis-sexed ones of the same kind as the females. Considering that sexlinks are different colors, the males should be fairly obvious. I am a little puzzled why they would leave them in the flock (since roosters eat feed and do not lay eggs.) I would expect that using a flashlight to grab the roosters at night would be simple enough for them to do