Dangerous dogs law updated This article describes the previous laws on dangerous dogs (particularly the Law of 6 January 1999) and their practical application, as well as the main provisions of the Law of 5 March 2007 and its consequences. From now on, dogs whose owners do not fulfil all the legal requirements will be considered as posing a serious and immediate threat which may lead to their euthanasia within 48 hours. Increasing constraints are imposed on owners of 1st and 2nd category dogs according to French law, including a behavioural evaluation of their animal, and liability for the costs of capturing and transporting the dog. The responsibility of maires has been changed and increased. Likewise, the responsibility and duties of veterinary surgeons in the control of dangerous dogs tend to increase as well. The Law of 5 March 2007 on the prevention of delinquency completes the Dangerous Dogs Law of 6 January 1999. Consequently, a special legislation on dangerous dogs is slowly being put into place (liability for the actions of animals and criminal offences), based on general law. To understand the importance of these changes, the previous laws and regulations are described, and the main changes brought by the new law are examined.