With that information, they could be anything.
The black appears to be a developing proper BCM. Shape, feathering, skin, shanks, all indicate that. Lucky rescue. Those can be more valuable if from good lines.
The gold white may be a sexlink, and thus female if from a hatchery, but I've noticed a lot of white. With its sketchy past, it may be a mixed breed. A lot of my mixes look like that.
The grey is likely mixed or could be a particular breed. All you can do is wait and post a photo as it nears adult feathering.
Since they are rescues they could be from anywhere with any kind of background.
The black appears to be a developing proper BCM. Shape, feathering, skin, shanks, all indicate that. Lucky rescue. Those can be more valuable if from good lines.
The gold white may be a sexlink, and thus female if from a hatchery, but I've noticed a lot of white. With its sketchy past, it may be a mixed breed. A lot of my mixes look like that.
The grey is likely mixed or could be a particular breed. All you can do is wait and post a photo as it nears adult feathering.
Since they are rescues they could be from anywhere with any kind of background.