Step 1 : Introduction to the question "What did some dinosaurs eat to help with digestion?"
...For some animals, swallowing stones is an important way to ensure food is digested properly. These small stones are called "gastroliths” and are typically used by animals that need help with digestion, such as birds, worms, and other kinds of invertebrates. And, apparently, dinosaurus: Paleontologists have found small stones inside the rib cages of fossilized dinosaurs.