The Bloodhound is a large scent hound, originally bred for hunting deer, wild boar and, since the Middle Ages, for tracking people. With the rise of fox-hunting, the decline of deer-hunting, and the extinction of the wild boar, as well as a more settled state of society, the use of the Bloodhound diminished. It was kept by the aristocratic owners of a few deer-parks and by a few enthusiasts, with some variation in type, until its popularity began to increase again with the rise of dog-showing in the 19th Century. Numbers, however, have remained low in Britain. As training progresses the handler learns to 'read' his hound's behaviour. The hound must trust its nose and the handler must trust the hound. From early hot trails on a familiar person, the young hound progresses to colder trails on the scents of strangers.