Help kick kitty stress to the curb with a little help from Comfort Zone’s 2X Pheromone Formula Calming Refill for Cat Calming. Feline stress can lead to all sorts of problem behaviors like scratching and urine marking. Comfort Zone refills contain a drug-free vapor that mimics the natural soothing pheromones cats release, creating a calming environment. This helps make the area feel comfortable and familiar to your cat, which can also help reduce her destructive behavior. These diffusers are purr-fect to use during stressful times, like when introducing a new kitty to the family, moving into a new space, or even while rearranging furniture. Simply attach the refill to the diffuser (sold separately) and plug it into an outlet located inside your paw-tner's favorite room. And don't forget to replace the refill every 30 days to keep the good pheromones flowing!