Oyster Shell In Poop?

[R2elk]

Ah, so she did overindulge. It should be fine.

That was @R2elk 's reply to my experiment....
....which after 15 hours the OS still has not dissolved.

In digestive tracts, the pH is acidic. Add a little vinegar.

 

[aart]

In digestive tracts, the pH is acidic. Add a little vinegar.

Yep, for sure vinegar will take it down....but, I was reacting to this.....

It dissolves as soon as it hits moisture.

...and I really think the OP duck passed some intact because she gorged on the stuff.

Now I wonder just what is the natural Ph of chicken innards.<scratcheshead>
Wonders if those who feed ACV have more problems with calcium absorption.
Brain goes down the rabbit hole.....