Hazrat Jabir (may Allah be pleased with him) narrates that the Messenger of Allah (peace be upon him) ordered the killing of dogs. People followed this command with such strictness that if a woman brought a dog into the city, the dog would be killed before she could leave. Then the Messenger of Allah (peace be upon him) said that if dogs were not a community created by Allah, I would have ordered all of them to be killed. Therefore, you should only kill the fierce black dog which has two spots between its eyes, because this dog is a devil.