A wireless fencing system comprises a tetherless leash, a programming fixture, and, optionally, a terminal. The tetherless leash, which is attached to a monitored animal, establishes a “virtual” (i.e., barrier-free) perimeter based on geo-coordinates. The tetherless leash also monitors the position and movement of an animal relative to the virtual perimeter, and delivers warnings, corrections, and praise to the animal in accordance with its programming. The programming fixture serves as a user interface during programming operations, since there are no exposed buttons by which a user can directly program the device. The wireless fencing system does not expand the perimeter in response to perimeter breach of a monitored animal. Rather, a protocol that monitors the animals speed and location direction of movement relative to the perimeter and/or outbound way points is used.
