Jeff is Tad Stones' loyal dog and supporting character in the Spanish American Film Tad: The Lost Explorer. Jeff is a dog wit ha big appetite and constant curiousness. He once accidentally swallows a tracking device that allows the enemies to follow them. By the time he vomits the device out, the villains had followed Tad, Sara & Freddy. He spends most of his time with Belzoni (who constalny tries to get rid of him, but fails within seconds). He is 6 years old, become an adult is for human, in his early 20s and 30s.