could it be an egg? I don't know precisely.
@Speceider , any idea on that? I am not an expert at palpation.
Feed stores may have Ca gluconate, some vets carry it. I buy it online at Jeffers - but I think most livestock supply places would have it. Tractor Supply?
Drugstore?
Could be...
If you can get her to a vet familiar with ducks (or at least poultry), they may be able to help.
They can develop egg yolk peritonitis, a scary infection that starts when some egg yolk gets loose in the body cavity. If caught soon enough, it can be treated. But my feeling is that we still...