Her tail is droopy. Does that always mean infection?
Hey Kris I am sorry, I do not know.
I think it is probably best to post your question on the ER Forum with a history to date and if possible, some pictures: https://www.backyardchickens.com/f/10/emergencies-diseases-injuries-and-cures More people will see it on the ER Forum than here.
Good luck!