ADAPTIL Calm Home Diffuser Starter Kit is the original dog pheromone diffuser, clinically proven to help calm and comfort your dog at home. It works by mimicking calming "comforting messages" that mother dogs naturally release in the air called pheromones. The continuous effect provides constant comfort, helping your dog or puppy to remain calm and adapt to stressful situations like staying alone, loud noises, thunderstorms, and visitors in the home. Trusted by veterinarians and pet owners worldwide for over 15 years, more than 8 million dogs have benefitted from ADAPTIL dog calming products.