The gizzard is the organ that helps the earthworm grind its food into a million pieces.

The gizzard is the organ that helps the earthworm grind its food into tiny pieces.

The gizzard.

It's Gizzard grinds its food.

No. They will however ingest pebbles. They do not however digest them. There is an organ in the neck which is called a gizzard and is basically a sack of rocks used to grind up seeds and such. They will peck at and swallow rocks but they aren't eating them, they are using them in their neck organ to grind stuff up.