FELIWAY CLASSIC Spray is the original cat pheromone spray, clinically proven to help calm and reassure cats of all ages on-the-go, and to help control unwanted behaviours like urine spraying and scratching in the home. It works by mimicking calming messages that cats naturally release in the air called pheromones, which help cats feel safe and avoid unwanted behaviours like urine spraying and scratching. Trusted by veterinarians and pet owners worldwide for over 25 years, more than 14 million cats have benefitted from FELIWAY cat pheromone products.