A black and white (white, chocolate and tan in the film) fox terrier. Unlike his friend, Rowf, Snitter was once settled into a home. After he lost his master in a road accident with a truck, he was sold to the laboratory by his master's sister. The scientists in the lab have performed numerous brain surgeries on Snitter, merging his conscious and subconscious mind. This causes him to have nightmarish flashes and dreams at random times, whether he is asleep or awake (similar to Fiver from "Watership Down"). Frequently he hallucinates the sight of his master approaching, and turns round in joyful greeting, only to find there is no one there. Once he and Rowf escape the lab, Snitter is determined to find another home for himself and his friend. Snitter is the most hopeful character in the book, and the most mysterious, since he can have several strange ramblings concerning his condition and past events. While he and Rowf are swimming out to sea, he has a horrifying vision of a man torturing and killing all the animals of the world, including some the existence of which he could not possibly know about, such as whales.