The Norfolk grey? Why do you think she's a bad example of her breed? Her plumage is much better marked than most specimens I've seen online (a small sample size though).The black one? She's an awful example of her breed and had such a rough start I wouldn't be surprised if she never lays well or at all. She's a survivor though and absolutely no trouble - kind of a background bird without being a pushover with the others, good forager and not at all bothered by bad weather.
Mine was tough as old boots too, laid fine, was an OK broody (though her one spur looked lethal). Least popular bird in the flock I recall; she liked nobody and nobody liked her. And didn't start laying till 11 months old!