The Brown Dog affair was a political controversy about vivisection that raged in Britain from 1903 until 1910. It involved the infiltration by Swedish feminists of University of London medical lectures; pitched battles between medical students and the police; police protection for the statue of a dog; a libel trial at the Royal Courts of Justice; and the establishment of a Royal Commission to investigate the use of animals in experiments. The affair became a cause célèbre that divided the country.