I wish u very good luck and hope she gets helped! I have no idea what to do. Perhaps post on Facebook to a duck group and see if anyone can offer help.
I wouldnt even if your certain as any noise, movement, or anything could set the animal off just never trust them as you never know what could happen. Been there done it, lost an animal.
please get to a vet ASAP they are your best bet please please never trust dogs, cats or any other animal like that with you ducks as you never know what could happen especially when your not home