DogTown trainer John Garcia and Head Veterinarian Dr. Mike Dix are shocked by the condition of Zambi , a black lab mix with a massive growth in her mouth . Worried the condition may be the result of cancer, Dr. Mike and another surgeon must perform a grueling 8-hour surgery in the hopes of giving this dog a new chance at life. Trainer Ann Allums gears up with Casey, a beagle mix whose hyper temperament has kept him from being adopted for the last five years . Ann trains Casey for an agility exhibition in the hopes of attracting potential adoptive families. When Bingo, a painfully shy shepherd mix , arrives at DogTown, trainer Pat Whitacre works to socialize the dog a task that requires both time and incredible patience.
