Help your feline friend find peace and comfort with TherapetMD Cat Calming Diffuser Refills. These refills are designed to fit perfectly into the TheraPet MD Pet Calming Diffuser (sold separately) to help provide up to 60 days of continuous calm with their dual-pheromone diffusion. Featuring mother-comfort and territorial-peace pheromones, this advanced formula helps reduce stress reactions, like spraying, scratching, and excessive vocalization.