Hi Caitlin,

No to mention that there a no oils in chickens' digestive tracts. If one assumes however, that a birds gastric acid could and would bleach pearls and dissolve a few layers of blemished nacre as well as add fatty acids by having extremely high-cholesterol gall, then that may be possible but not with chicken but with geese and not by feeding the pearls to them in any regular way but by stuffing them as in force feeding to produce foié gras.

Zeide