FELIWAY(R) Refills for Diffuser Cats that mark their territory with facial rubbing indicate they are happy and comfortable in their environment. Cats under stress are more likely to mark their territory with scratching or urine spraying, not facial rubbing. FELIWAY can provide your cat comfort and calming at home. It mimics the feline facial pheromones (F3) used by cats to mark their territory as safe and secure. Cats don't want to scratch or urinate where they detect the facial feline pheromone. Features: Refills for Diffuser Diffuser not included; sold separately Available in 1-pack (one month) or 3-pack (three months) 1pk C23850Y P05089 899484001296