Cedarosaurus was a sauropod that lived in North America, during the Early Cretaceous period. It may have been prey for Utahraptor, a Dromaeosaur that also lived in Early Cretaceous North America, as shown in the beginning of the third episode of the documentary Dinosaur Revolution, with two packs both chasing after a herd of Cedarosaurus, and they attack a juvenile, but all get either killed or scared away by one of the adult sauropods. One Utahraptor also gets eaten by a North American prehistoric crocodile, by falling in a lake.
Cedarosaurus herd dinosaur revolution

A herd of Cedarosaurus in Dinosaur Revolution.