Feliway Classic Calming Diffuser Refill for Cats, 30 day, 1 count—Feliway Classic Calming Diffuser Refill for Cats mimics the invisible calming messages, known as pheromones, that your cat naturally produces. This helps your feline friend feel comfortable and secure and helps reduce signs of stress.

Feliway MultiCat Calming Diffuser Refill for Cats, 30 day, 1 count—After cats give birth, they naturally produce pheromones that send “harmony messages” to their little ones. These messages are calming and promote bonding. Feliway MultiCat Calming Diffuser Refill for Cats mimics these natural pheromones to restore harmony between felines who live together.