Harlequin Dane is the wealthy manufacturer of His Master's Choice dog food in the second season Dog City episode "The Great Dane Curse."
Dane is the richest canine in Dog City, owner of Harlequin Dane Enterprises. He's also a controlling elitist who disapproves of his daughter Candice Dane's relationship with Bruiser. He hopes to marry her off to Thirsty Howl IV instead. He has Ace Hart brought to his mansion to explain his position. The detective ultimately compels Dane to leave his daughter's personal life alone by revealing that Dane uses cereal as filler in His Master's Choice.
Dane employs Maurice, a cat, as his personal henchman (referencing Morris, the finicky cat from the Nine Lives cat food commercials).