Casper Caveman and Fido, the dinosaur
Daffy Duck and the Dinosaur was an animated cartoon released in the year 1939.
When B'Elanna Torres surprised her boyfriend Tom Paris with a television set in 2376, Daffy Duck and the Dinosaur was one of the movies he watched. The film featured a character named "Casper Caveman" and his pet dinosaur, Fido. (VOY: "Memorial")