This is extreme and a last resort IMO.
First, find out if she does have any wound, infected or not.
Birds can suffer mild strains and sprains, just like we do.
It can take weeks to recover, as long as she can get around good enough to eat and drink, just leave her be.
If limp is really bothering them by inhibiting their normal activities too much, I will isolate them in a crate to 'force' rest for a day or two. Letting them out late in day, an hour before roost time, to give them a stretch and evaluate their mobility, then decide if they need another day and put them back in crate off roost after dark. Repeat stretch and eval the next day until they are better. Keep crate in coop so bird can remain 'with' the flock.