Terrier work plays an important role in fox control, especially on livestock farms and where game shooting takes place. It is the only legal method of controlling foxes underground.
If a fox is run to ground, digging may only take place with the expressed permission of the landowner or farmer. It can only be carried out by those licensed by the appropriate governing body. Normally the terrierman will be accompanied by only one assistant. Due to the possible use of a humane killer licensed firearm and to avoid unnecessary noise and disturbance, participation is limited to the terrierman and his assistant with sometimes the presence of the relevant farmer or gamekeeper.