Cat Products FELIWAY Optimum, Enhanced Calming Pheromone 30-day Refill – 1 Pack 4.4 out of 5 stars(11234) $20.00 (as of February 11, 2025 07:12 GMT +00:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.) FELIWAY Optimum Cat, Enhanced Calming Pheromone Diffuser, 30 Day Starter Kit (48 mL) 4.0 out of 5 stars(16835) $29.99 (as of February 11, 2025 07:12 GMT +00:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)