Jack

"That mutt peed on me!"
- Jack after trying to steal a French Poodle.

Jack is one of the tertiary antagonist of ''Homeward Bound II: Lost in San Francisco. ''He and his sidekick, Ralph, drive a "Blood Red Van" that they use to take local dogs to a science lab. Jack is constantly smoking cigarettes, and doesn't discard them right. One of them leads to a nearby house catching on fire.

Ralph
He often yells at Ralph when he refuses to do something he wants him to do.