Certain groups of dinosaurs included a succession of types that were increasingly adapted for efficient food processing.

The preferred food of hadrosaurs (duck-billed dinosaurs of the Late Cretaceous) was palms that grew low to the ground.

In many fossils, there are no obvious physical differences between herbivorous and carnivorous dinosaurs.

Though slicing teeth are usually only found in meat-eaters, the plant-eating Triceratops had sharp beaks and teeth that resembled serrated blades.

Cellulose-heavy diets, as suspected in dinosaurs like the Diplodocus and Apatosaurus, would have required an unusual bacterial population in the intestines to break down the fibre.

Some dinosaur species, including sauropods, could likely have fed on grasses.

Flesh-eating dinosaurs account for about 40 percent of the diversity of Mesozoic dinosaurs. 

Which prey victims many carnivores preferred has not been established.

Lizards, birds, and other animals were fair game for carnivorous dinosaurs—but other dinosaurs were not.

Multiple remains of the predator Deinonychus found with the bones of a single large prey animal suggest that Deinonychus hunted in packs.