The Plague Dogs is a 1982 animated film based on the 1977 novel of the same name by Richard Adams. The story is centred on two dogs named Rowf and Snitter, who escape from a research laboratory in Great Britain. In the process of telling the story, the film highlights the cruelty of performing vivisection and animal research for its own sake.
Twenty-eight days after a killer virus was accidentally unleashed from a British research facility, a small group of London survivors are caught in a desperate struggle to protect themselves from the infected. Carried by animals and humans, the virus turns those it infects into homicidal maniacs -- and it's absolutely impossible to contain.