The Feliway Optimum Refill is to be used with the Feliway Optimum Diffuser. It calms cats better due to a new feline pheromone complex that helps them cope with our modern lifestyles.
Pet Remedy De-Stress & Calming Atomiser Refill. The water based, non-aerosol, battery operated atomiser uses the special Pet Remedy blend of essential oils which work alongside your pet's natural relaxation pathways.