I've watched her really carefully after noticing she didn't lose her feathers last year, when everyone else was getting fluffy and fresh again. Her wing feathers are the the worst...tattered stubs. I will try to get a closer pic of her back later.
I don't think it's a breeding issue. We have 12 girls and 2 drakes, and she is one that will actually rebuff the drakes advances and refuse to breed. She's saucy. She also doesn't seem to take a laying break...she is the only one who has continue to lay this fall.