 Hunts may also use terriers to flush or kill foxes that are hiding underground, as they are small enough to pursue the fox through narrow earth passages.This is not practiced in the United States, as once the fox has gone to ground and is accounted for by the hounds, it is left alone.The horses, called "field hunters" or "hunters," ridden by members of the field, are a prominent feature of many hunts, although others are conducted on foot (and those hunts with a field of mounted riders will also have foot followers).