How do you deter a dog from trespassing?

To deter a dog from trespassing, first ensure your property is secure by installing a sturdy fence or using barriers that are difficult for dogs to jump over. Additionally, consider using deterrents like motion-activated sprinklers or ultrasonic devices that emit sounds unpleasant to dogs. Training your own dog to stay within boundaries and providing ample exercise can also reduce the likelihood of them wandering. Lastly, you can use scent deterrents, like vinegar or citrus sprays, around the perimeter to keep dogs away.