The Halo Collar 4 ($599 plus a required subscription plan) makes it easy to set up virtual fences and offers plenty of feedback options ranging from sounds to shock. Like competing products, it ...

[Lou] sent in this amazingly simple hack that has been saving him money on special batteries for his dog collar. He uses an invisible fence system which gives the dog a shock if it passes beyond ...

$319.95 at Amazon The weight and shock level of some collars make them more appropriate for larger dogs. The PetSafe Stay and ...

He developed a wireless fence where you simply draw the invisible fencing boundaries on your phone and use the accompanying GPS enabled dog collar to keep your pet safe inside a defined perimeter.