Sentry Clming Collar helps cats in fearful or stressful situations - separation anxiety, fireworks, thunderstorms, visitors, new baby, vet visits and traveling. These calming collars mimic 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 fearful situations. The lavender and chamomile provide soothing fragrance.