GRASS VALLEY, Calif. -- Gibson -- the world's tallest dog and one of Grass Valley's most famous residents -- is suffering from bone cancer.
The harlequin Great Dane, who stands more than 7 feet tall, has appeared on "The Oprah Winfrey Show."
Earlier this week, veterinarians had to amputate Gibson's right front leg.
The dog's owner said he's coming home later this week and she expects him to be in the limelight in just a couple of months.
Gibson is listed as the tallest living dog by the Guinness World Records.
According to the site K9Grass, Gibson is a certified therapy dog.