Woof

was one of Joker's Jokerz.

History
Woof was a giggling criminal spliced with DNA from a hyena, who joined the Jokerz. He would often be paired with Ghoul. When Terry attacked the Jokerz headquarters, Ace chased Woof away.

Alternate timeline
Woof still worked with the other Jokerz under Chronos. However, in this timeline, he had been physically altered to have robotic arms. Even with these new features, he and the rest of the gang were still defeated.

Feature film

 * Batman Beyond: Return of the Joker

Justice League Unlimited

 * "The Once and Future Thing Part One: Weird Western Tales"
 * "The Once and Future Thing Part Two: Time, Warped"