See how one week could improve your kitty's behavior with the Comfort Zone MultiCat 30 Day Starter Kit Calming Pheromone Diffuser for Cats. This diffuser emits a continuous, fragrance-free, and drug-free mist that mimics natural cat pheromones, signaling safety and familiarity. Feeling safe helps calm your furry friend and promotes positive behavior, letting your meow machine’s full personality shine. This pheromone diffuser helps reduce unwanted behaviors like urine marking, excessive scratching, hiding, nervousness, cowering, and more. Most cats showed improved behavior as soon as seven days.