Great to hear he is back to quacking! I think you need to post this in our ducks section for our duck experts. We here in the new members section may or many not know enough to tell you what you might find directly from the ducks experts!
Hello there and welcome to BYC!
I am so sorry about your bird. She is a cutie pie! You will want to post this in our ducks section for help from all our duck experts...https://www.backyardchickens.com/f/42/ducks
Good luck and I hope she is ok. :-)