Sentry HC Good Behavior Pheromone Collars mimic the pheromone that the mother dog or cat produces to calm and reassure her puppies or kittens. The calming lavender and chamomile scent provides a soothing fragrance. Pets recognize these pheromones throughout life. It mimics the natural way to help dogs and cats cope with new and fearful situations. Convenient alternative to diffusers which are limited for use in the confines of a designated room. Good Behavior collar goes where your dog or cat goes whether it is at home or on the go!