If you have a dog, he or she will, at times, need to go outside. You can put your dog on a leash, or you can opt for a more modern alternative. I think a wireless pet fence is a great investment. It allows your dog to have more freedom in the backyard, but it also ensures his or her safety, by creating an invisible barrier in which your dog will not cross. If you live along a busy street, it will give you peace of mind, knowing that your pet is safe out in the yard.