Feliway Diffuser also comforts cats in difficult situations or new surroundings - For best results, Feliway Spray can be used in conjunction with Feliway Diffuser. - If a cat has a history of urine spraying, the Feliway Diffuser should be plugged in at least 48 hours (ideally 1 week) before any stressful event i.e. new pet, building work, parties, moving house etc.
eBay