Tab as she appears in the Film, injuring Hazel
Tab is the farmer's cat who lives in Nuthanger Farm and who appears in the book and movie.
History
In the book, Tab is a male cat (but portrayed as female in the movie) who taunts his prey. He also has a sort of ambition to kill Hazel. When Hazel and Pipkin were trying to steal some hutch rabbits - Clover, Boxwood, Haystack, and Laurel - from the farm, Tab tried to creep up on them. Pipkin spotted him, however, and Hazel taunted the cat into jumping at them before they made their escape.
Later during the Battle of Watership Down, after Hazel released the guard dog, Bob, Tab went after Hazel and caught him. However, the cat's owner, Lucy, saved Hazel's life.
In the book there is also a female tortoiseshell cat from Nuthanger Farm whose name is unknown. This unnamed cat got into a fight with Bigwig and lost, with minor injuries. This cat is often mistaken for Tab.
TV Series
In the animated series, Tab is characterized as a female cat, known as Tabitha.