Bob is the fierce guard dog for Nuthanger Farm who proved to be an obstacle whenever the rabbits of Watership Down ventured there. Later, however, Bob unwittingly played a crucial role during General Woundwort's siege on the Watership Down Warren that ultimately resulted in a victory for the Watership Down rabbits, defeat for the Efrafans and the permanent disappearance of General Woundwort.
Watership DownEditWhen Hazel and Pipkin first ventured to Nuthanger Farm to search for does they encountered Bob sleeping in his kennel. After being discovered by the farm cat, Tab, Bob awoke and starts barking, attracting the attention of the humans of Nuthanger Farm. This was repeated during the next visit to the farm during which Hazel attempted to bring back the hutch rabbits to Watership Down.During General Woundwort's siege on Watership Down, Fiver went into a trance, and started moaning about "a dog loose in the wood". From this, Hazel created a plan to release Bob and lure him to the attacking Efrafans that were attacking Watership Down. After Hazel released the dog, he was caught by the farm cat Tab, but saved by Lucy, one of the humans of Nuthanger Farm. Dandelion and Blackberry then continued the plan, leading Bob back to Watership Down where he threw the attacking Efrafan forces into disarray. He also attacked Woundwort, the outcome being ambiguous because Woundwort's body was never found. Bob returned to Nuthanger Farm with a scratched nose and a bite wound on his leg.
In the Netflix series, Bob is a Rottweiler instead of a Labrador.
He first appears when Hazel, Fiver and Bigwig rescue Clover from Nuthanger farm. He attempts to attack the rabbits, but is held back by his leash.
Later, Fiver bites through Bob's rope so Hazel and Blackavar can lead him to the Efrafan army. During the chase, Bob comes very close to catching Blackavar, but Hazel gains his attention at the last second and successfully leads him to the Efrafans. Bob scares off the Efrafans and manages to kill Captain Orchis who is paralyzed by fear. General Woundwort, however, fearlessly stands his ground, and the rabbit and dog are last seen leaping at each other.