Easy there pup, its 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 mothers 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. Pop on your dogs ThunderEase Collar for up to 4 weeks of continuous calming. Your dogs natural body heat will activate the pheromones for maximum effect.