Yes, when the days start to get shorter, like now, all of your older birds could molt at the same time. Young just starting to lay pullets might keep laying all winter, but extra light helps. I have a light that comes on now @ 8pm. Soon I will be turning on the light for them at 6 am, too.
With a nice scab, which that looks to be, I would not bandage it. Dry, Air, Clean. Maybe you could put a "look no touch" type of run out with her friends visible? Low, clean, lots of feed and water accessable with a bantam bud you mentioned? Birds will pick on an injured flock mate, and pick the...
Keeping a dressing on a chicken is difficult! Once the leg has scabbed over and is dry, not oozing or red or inflamed, I would see how she does without a dressing. Other chickens pick on the injured one, but if you have one that is mild mannered, your injured bird might do better with company...
Same plan here. Feathers are all over my yard already 😔. Young birds are almost ready to start laying now. Young ducks are starting to lay now. We are eating lots of small duck eggs now!