The SENTRY Calming Collar helps reduce the fear of loud noises and excessive meowing in cats. This collar helps reduce and eliminate stress-related cat behaviors such as being destructive or anti-social. The SENTRY Cat Calming Collar helps to stop inappropriate marking and unwanted scratching.  SENTRY Calming Collar for Cats and Kittens provides a long-lasting releasing pheromone for up to 30 days.