Drover C. Dog is a younger dog who lives on the ranch with Hank. Hank refers to him as his assistant, or as a "little mutt" when Hank is angry with him. In Drover's Secret Life, Drover tells the story from his birth to when he came to live on the Ranch. He scratched it out in the dirt in the machine shed.
Unlike Hank, Drover has no delusions of grandeur and enjoys spending most his time staying out of trouble and sleeping (16 hours a day according to Hank), often engaging in useless tasks he invents for himself. In The Case of the Car-Barkaholic Dog, for example, Hank observes that while he is helping the cowboys with the cattle herding, Drover spends the afternoon chewing on an old horn, buries it, and then promptly forgets where it is buried. He is also unashamedly timid, and frequently avoids "the call of duty" by pretending to have a bad leg. Drover has a great deal of curiosity and often asks Hank obscure questions such as "Why does the moon rise in the evening and set in the morning?" Hank rarely knows the answer to these questions, but this doesn't stop him from providing ones. Drover often appears to have more common sense than Hank, which allows him to avoid getting into many of the same catastrophes Hank creates for himself.
"Oh my leg!"