A Sharptooth's Heart

A Sharptooth's Heart is a 2005 British independent animated adventure drama film written and directed by Jake Grantham, and was based on the fanfiction of the same name by Sora W.T.K.. It was produced by Roger Brownstone for Grantham's production company Mithril Films. In the film, when a deadly instinct is manifested inside the body of a once carefree dinosaur of unknown origin, a velociraptor, blinded by anger, will stop at nothing to get revenge.

Plot
Rex, a mysterious winged anthro-like dinosaur who has lived in the Great Valley all his life, never questioning about his own existence in the valley. He was found all alone as an egg by Littlefoot, who was also Rex's very first sight of life outside his egg. Since then the two of them have been like brothers.

Shortly after the story's beginning he finds out about his carnivorous ("Sharptooth") heritage, and thanks to two Velociraptors, Zill and Bull, invading the valley, Rex get his first taste of meat and is forced to exile himself from the Great Valley. Thanks to his strong bond between Littlefoot and the others, Cera, Ducky, Spike and Petrie, the gang sets off to find their missing friend. During the course of the story Rex has made friends with Yu and his Velociraptor pack, and even a Land Before Time character favorite, Chomper.

Later on another anthro-like dinosaur, named Kumo, shows up in the story. He's eerily similar to Rex except Kumo doesn't have any wings. His meddling with the gang caused an identify confusion between Rex and Kumo, which has led to all them to believe Rex has totally given in to his Sharptooth side and betray them. Littlefoot however, thought differently and with determination he later on clears the air.

Near the end a pack of anthro-like wingless dinosaurs, called The Arich, lends a hand in the story, helping Rex, Littlefoot and the rest of the gang back to the Great Valley to show them a secret entrance into the valley. Rex, however, decides to stay outside the valley, the Mysterious Beyond, along with Chomper and Yu until he gets the answers to his questions, thus seperating Littlefoot, Cera, Ducky, Spike and Petrie, from Rex for the time being.

Voice cast

 * as Rex
 * as Yu
 * Dennis McKee as Littlefoot
 * Kathleen Doherty as Cera
 * Chloe Blackburn as Ducky
 * Jake Grantham as Petrie
 * Alan Rawson as Spike
 * Stuart Hunter as Chomper
 * as Bull
 * as Zill
 * Martin Sutcliffe as Kumo
 * Pravinkumar Patel as Jaser
 * Richard Halstead as Pascal
 * Crispin Valenzuela as Braun
 * as Druce
 * Brian Blakeman as Topsy
 * Daniel Fotheringham as Grandpa
 * Joanne Goldthorpe as Grandma