Easy there pup, it's time to put an end to problem barking, destructive chewing, trembling, and many other not-so-fun symptoms. ThunderEase helps your dog feel calm and comfortable by mimicking a mother's natural nursing pheromones. Tested to be over 90% effective for reducing anxiety and unwanted behavior, your dog will feel safer and less-stressed, totally drug-free. Plug your ThunderEase Calming Diffuser in the room your dog uses the most and watch the difference in behavior. One 30-day refill included.