Buck (The Good Dinosaur)

Buck is a character in the Disney/Pixar film The Good Dinosaur. He is Arlo's brother.

Official Bio
"Buck is Arlo’s brother: they’re the same age, but Buck is bigger, stronger and a little rambunctious. He likes to tease his fearful brother as often as he can—and Arlo is an easy target. Buck’s size, strength and confidence allow him to do things that Arlo can’t imagine doing—like ripping a tree out of the ground with his teeth."