Which tool is specifically used to direct pigs into an enclosure?

The correct tool used to direct pigs into an enclosure is the hurdle. Hurdles are movable barriers or gates that can be positioned to guide animals, such as pigs, into a specific area or enclosure. They provide a physical barrier that helps to herd the animals effectively, allowing handlers to control their movement without causing stress or harm.

In contrast, the other tools mentioned serve different purposes. A hobble is generally used to restrict the movement of an animal's legs, while a head snare is designed to immobilize an animal's head for handling or examination. Milking hobbles are specialized restraints used in dairy operations, not for directing pigs. Understanding the distinct functions of each tool helps ensure that the correct equipment is used for safe and effective animal management.