NAME: Bacchus
BREED: Great Dane
AGE: 2 Years

ABOUT THE DOG: Bacchus is a massive 150-pound Great Dane named after the Roman god of wine. He came from a breeder near San Francisco and was relatively well-behaved in the beginning. He excelled at his obedience classes until one day, he started lunging after the other dogs, biting two within a week of each other. Because of his escalating canine aggression, Bacchus's weekly trips to the dog beach have been called off.

ABOUT THE OWNERS: Hailie McGetrick and Heath Moore live in Long Beach, California. Heath works as a printer and Hailie is a high school history teacher. They are an athletic couple who like to take Bacchus on long hikes in the mountains. Heath is also an avid cyclist who enjoys having Bacchus run alongside his bike.

BEHIND THE SCENES: Field Producer Todd Henderson's animated dog Curly took one for the team during filming. To show the owners how an overly excited dog can induce aggression, Curly ended up on the receiving end of a bite on the nose from Bacchus. But in the end, neither dog was injured and the rest of the shoot went on with no problems.