Each of your dogs wears a comfortable collar that has a receiver that emits an audible or static correction when approaching the hidden fence boundary. With your pet on a leash, we walk the perimeter of the property with you several times and start with a light correction to get the dog’s attention, and then direct the dog to the inside of the yard so the dog learns this is the safe side. Most dogs pick up on the system quickly. After a couple of weeks, we suggest you turn up the level of correction. The static correction, which is adjustable, does not hurt your dog. It’s meant to get their attention to keep them inside the boundary and safe even when something – perhaps a squirrel – tempts them to cross the line.