The Feliway Classic Cat Calming Diffuser & Refill Starter Pack is a simple and effective pheromone therapy to help you manage your feline friends anxiety levels, keeping them calm and composed. Cats, like people, are complicated creatures. Sometimes they get stressed, or agitated. Perhaps you've brought a new cat into the family, or your cat has returned from a stressful stay at the vets.Feliway Classic is Veterinary recommended and scientifically proven. Used, trusted and recommended by vets for over 25 years.When to use Is your cat manifesting signs like urinating in unsuitable places, damaging walls or furniture (in various locations)? FELIWAY Classic will help Is your cat manifesting signs of stress like hiding, being less active, less interested in food, over-grooming? FELIWAY Classic will help Do you plan to make changes in your house? Moving home? Renovation? New pet or baby at home? FELIWAY Classic will helpHow to useIt's easy! Just plug and play: screw the vial into