Tog is a character in Mighty Mightor.
He is the blue, winged pet dinosaur of Tor. After Tor and Tog save an old hermit from a Tyrannosaurus Rex, the hermit gives Tor a magic club that changes him into Mightor, and Tog into a fire-breathing dragon.
Amazingly, although the cave people know Tog in both his dinosaur and dragon forms, they never figure out that Tor and Mightor are one and the same.