REDUCE CAT CONFLICT & FIGHTING: From FELIWAY, the makers of the original vet recommended cat pheromone diffuser, use FELIWAY FRIENDS to promote harmony in multicat homes and to help reduce fighting, tension and conflicts between cats already living together. Diffuser device sold separately. SAFE & VET-RECOMMENDED EXPERTISE: Proven for 84% of cat owners who saw that their cats were getting along significantly better after using FELIWAY FRIENDS. For over 25 years, FELIWAY cat pheromone products have helped more than 14 million cats worldwide, thanks to FELIWAY's expertise in cat stress, and innovation in cat calming. EASY-TO-USE: Plug in an open area where your cats spend the most time. Due to size, it's recommended to use an outlet free of any other devices. Each diffuser covers approximately 700 sq ft. Leave plugged in continuously with 4ft of clearance above. Note: when operating properly, the diffuser device will get warm to the touch in addition to a green indicator light turning on. FOR BEST & CONSTANT SUPPORT: Use only FELIWAY diffusers with FELIWAY refills. Refills last up to 30 days and should be replaced when empty. The diffuser device should be replaced every 6 months. Best results are seen after 3 to 4 weeks of continuous use though some cats show improvements within the first 7 days. NOTE: Multi-cat behaviour is especially complex and occasionally multiple approaches are necessary to help manage it. HOW FELIWAY FRIENDS WORKS: Provides the same "harmony message" as the feline appeasing pheromone, which mother cats give off when nursing their kittens to help them all get along better. It is scentless, has no affect on humans or other pets, and is proven to reduce cat conflict and tension between cats already living together. › See more product details