Good Behavior Pheromone Collar helps cats in fearful or stressful situations (separation anxiety, visitors, other household cats, loud noises, new baby, vet visits, traveling). Good Behavior Pheromone Collar provides a convenient alternative to diffusers which are limited for use in the confines of a designated room. How does it work? Good Behavior Pheromone Collar mimics the pheromone that the mother cat produces to calm and reassure her kittens. Cats recognize these pheromones throughout life. It mimics the natural way to help cats cope with new and fearful situations. Lavender Chamomile fragrance.