One man installed a special system to prevent his dog from escaping the site: a fence with sensors and a necklace. The essence of the device is that when approaching the fence, the collar begins to feed. If the dog runs out of the boundaries, it will be hit by a weak current discharge.

Every morning the dog approaches the fence, the collar begins to feed, the dog waits for the sound in the collar, the battery does not sit down and runs away.