The neighborhood dogs began to run into your yard? You can cole with it using a modern and humane unit called ultrasonic repeller. One of the best models is a universal Yard Sentinel Repeller with a motion sensor, which deters not only the wild beasts of the forest, but the neighborhood cats and dogs that liked your lawn too. Also you can use other devices with motion sensor in your yard such as motion activated sprinklers, which repel animals with a powerful jet of water. Read more about them in Top 3 of The Best Motion Activated Sprinklers.