1. We have a device to repel and prevent barking of dogs, cats, and wolves. It runs on solar energy and repels wolves, snakes, rabbits, and birds. The device is tested and excellent, with a long-range vibration feature. It can be placed in farms. 2. There is another small device that repels dogs, cats, and wolves and prevents them from approaching and howling. It has a small size feature that can be put in a pocket and sends out vibrations to prevent dogs from approaching.