Don't know about her leg, but if you can manipulate it without her flinching and she otherwise appears OK, I would agree with greatbarnet and just keep an eye on her to see how she gets on. As for the laying, join the club! My Sussex and also my other purebred, a Cream Legbar, have stopped laying recently, having had long seasons through the summer, and I'm not worried as they are just taking a well-earned rest, normal for purebred birds. Hybrids will usually keep going come what may, this productivity is what they are bred for commercially, but they do tend to burn out sooner than purebreds which sensibly don't always live life so much in the fast lane. The lack of light as the days get shorter also affects their pituitary glands and results in a go-slow or stop to laying. Very sensible, really, as they need their resources to recover from their moult, if they've had it, and then keep warm in winter. Their bodies realise it's not the breeding season, not suitable for chicks in the cold weather, so they often pack up laying until the days lengthen again after the winter solstice. Also, from the history of these birds that you posted earlier, it does sound as if, lovely though they are, they may not be bred to be great in the egglaying department anyway.