Thanks for the update. That's crazy! I hope she does well!Wanted to come back and update here. After 3 weeks of nursing this duck at home and many attempts to extract this egg, I was pretty confident she was not egg bound (because she would have died already) so we headed to the vet. She confirmed my suspicion- this duck has an ectopic egg. It’s basically floating in her abdomen and won’t come out. She did not recommend surgery for several reasons but did say that unless she’s poorly she could live like this for some time.
We brought her home and are working on a set up to give her the best ducky life possible. She does need to gain some weight but otherwise is in good health. We need to be careful she doesn’t rupture the egg- it would create an infection in her peritoneum and kill her. Outside of that, there’s even a chance she may lay more eggs in the future.