Dempsey (c. 1986 – 2003) was a female American Pit Bull Terrier who was the subject of a high-profile challenge to the British Dangerous Dogs Act 1991.

[1] While being walked one evening in April 1992, muzzled and kept on a lead in accordance with the law, she began acting sick and her muzzle was removed, allegedly to allow her to vomit.

Three months later, at Ealing Magistrates' Court, Dempsey was ordered to be euthanised for failing to be muzzled in a public place.

Appeals took three years before the Crown Court,[2] the High Court and the House of Lords, during which time the media covered the story, not least Auberon Waugh in his Way of the World column in The Daily Telegraph.

[3] The case was dismissed in November 1995 on a legal technicality, as it emerged that Dempsey's owner, not involved in the original incident, was unaware that the court hearing was taking place.