Herding instincts can be measured at noncompetitive herding tests. It occasionally attacks livestock and herding dogs. European settlers used the dog for hunting and herding livestock. Terriers were bolder than hounds and herding dogs. They are used primarily for herding cattle. The use of dogs for herding sheep makes good economic sense for many farmers. They established agricultural communities or societies based on herding cattle. The Pulis were used for both herding and guarding livestock. Collies can compete in herding events. Their main subsistence comes from hunting and reindeer herding. In 1827 Shevchenko was herding community sheep near his village. The Rottweiler is one of the oldest of herding breeds. The corgi is one of the smallest herding dogs. They are also killed by herding dogs. Border Collie Collapse or "the wobbles" is a disease found in many herding/working breeds.