Invisible fencing is a system of wires that are buried in the ground. The dog wears a receiver on its collar. When the dog crosses the wire in the ground, the dog receives a shock to the neck from the receiver. The theory is that the dogs learn (by being shocked) where the boundary is and then stay within the yard.
Originally Posted by Lucy's mum
Some systems are cheaper than actually installing a fence and in some instances people are not allowed to build a fence due to city ordinances or housing community rules.
Some of the drawbacks with this type of fencing have already been discussed:
--punishment training through pain
--no security from outside predators (thieves, dog aggressive dogs, male dogs)
--not 100% guaranteed to keep your dog at home
Another issue with invisible fencing is that, should the dog cross the barrier in pursuit of something like a rabbit or squirrel (or a person walking by!), the dog is punished for trying to go home! The shock works anytime the dog crosses. So if the dog does leave temporarily, the dog learns to stay away from the yard to avoid another shock. :S
Cedar (tri), Willow (blen), Holly (ruby), & Bella (blen)