SportDog Dog Fences are the only containment systems that have the ability to cover an area up to 100 acres. That may seem a little extreme to some but SportDog Dog Fences like all products of SportDOG are specifically design for the sporting and hunting dog breed. These types of dogs have a temperament that is a little different than Fido the couch potatoe. They know these dogs need a systems that can cover an area larger than the average home. SportDOG Dog Containment products are high quality and long lasting and can be the perfect choice for any ranch or farm owner.