As a person who has raised chickens for over 50 years, let me say that this is not quite possible. There is only one place that chickens can put a pearl, and that is in their craw. Chickens have a little pouch on their chest you can feel just below the wishbone They eat pebbles and bits of oyster shell to fill up the craw. then any grain or bugs they eat are mechanically reduced to meal as they pass thru the craw and they don't leave the craw until they are reduced to a ground cornmeal-like material. If a chicken ate a pearl, it would have to be a rather smalll one and the pearl would stay in the craw until it was ground up into powder or until the bird was slaughtered. If a chicken ate a pearl, it might get more rounded in the craw, but I would not count on it!I read somewhere that feeding you pearls to chickens will clean them! Of course you have to unstring them first.