Feline Diffuser Refill releases pheromones through a constant vapor. M2B. These pheromones, with action analogous to those naturally secreted during maternity and facial pheromones, help control inappropriate behavior in felines. These behaviors are generally a consequence of stress and anxiety in challenging situations and are manifested, for example, with urine marking, fingernail marking on furniture, chewing of objects, exaggerated meowing (vocalizations), elimination of feces in inappropriate places, etc. Compared with natural pheromones, M2B pheromones have greater stability, diffusion level and residuality in the environment. SERENEX® works in both kittens and adult cats. It is a drug-free solution recommended by veterinarians for behavioral problems. It can be used in conjunction with other medications or other treatments. Container: 42 ml