For more than a decade SENTRY has worked side by side with leading pet experts and top universities researching effective ways to help pets lead happier less stressful lives and to strengthen their bonds with their owners. Cats and kittens cant talk so the way they show they are scared frustrated or not feeling well is to change their behavior like excessive meowing scratching marking inside your home and being anti-social. SENTRY Calming Diffuser for Cats quickly releases a pheromone into your home to help calm and alleviate unwanted behaviors. This affordable easy-to-use plug-in can be used anywhere your pet spends most of their time. Replace diffuser bottle every 30 days for maximum effectiveness. Good behavior is right around the corner with SENTRY in-home calming products.