Looks like an Australorp and a production Red hen. I'm thinking mating damage, not molting. Depending on how old they are, they may molt this fall and take the winter off laying, then start back in the spring.
the pretty little silver bird does look like a mixed breed. The body shape make me wonder if there's something like Phoenix in the background a ways, with that nice long tail. She may have some game bird in her, honestly I'm not sure what else is in there. She's very pretty, though, and I'll bet she'll be a good momma if you're so inclined to use a broody hen to add to your flock next spring.