Compsognathus is a small dinosaur that could grow to the size of a chicken that he is from The Land Before Time.
They are seen in the first film. The one was scared by Hopper. They are seen also in The Great Longneck Migration. In Cera's sleep story about Littlefoot returning to the Valley and being welcomed as a hero, a small pack of them is running next to Cera. They are green and small and are cheering for Littlefoot. Due to this portrayal in her sleep story, it can be assumed that probably due to their small size Compsognathus are friendly with Leafeaters, and possibly inhabit the Great Valley. It is unknown what they are called, it is possible they may be called Tiny Sharpteeth, similar to how Mussaurus is called a Tiny Longneck.