The first one is not a Rock, as Partridge Rocks have different coloration, even hatchery types. The last one may be a hatchery Orpington but honestly I think it's a cross with that much leakage in the neck. And white legs are dominant, making an F1 outcross quite similar. Plus the comb appears to be a modified rose or pea comb?
first one looks like a welsummer? The second is a really cool looking EE (why can't I find any colored like that?! LOL), and I think the third is a buff x ee...looks like it has a pea comb...and the body shape is wrong for a buff...and I think it looks like it is trying to have muffs...can you take a closer picture of the head and body of this bird? Do you know how old they are?