![[Psittacosaurus]](./dinosaur/psittaco.jpg)
Dino Dung.
High nutrition food is relatively easy to absorb into the body, so the intestines of carnosaurs may not have been very lengthy. With most of the food digested, they probably expelled compact droppings.
Microbes.
Plant nutrients are wrapped up in a substance called cellulose (the chief substance of the cell wall of all plant cells), which forms a tough wall around every plant cell. Many animals cannot digest this themselves, so they have a gutful of friendly bacteria (microbes) that do it for them. The microbes are protected well fed, and the animal shares the nutrients.
Stoned.
Smoothed, rounded pebbles have been found in association with the central parts of fossilized dinosaur remains. These stones may have been swallowed on purpose, to help rush and squash the plant food. These stomach stones are known as gastroliths.
