Keep calm and purr on with the NurtureCALM 24/7 Scented Feline Calming Pheromone Collar. Proven to modify your cat’s behavior when faced with stressful situations, this collar works by replicating the pheromones produced by mother cats to calm and reassure her kittens—something your cat will recognize for life. And because the collar goes wherever your cat goes, it offers a mobile alternative to diffusers, so you and your cat can enjoy its calming effects during vet visits, thunderstorms, or even just as a treatment for separation anxiety.