ADAPTIL Junior puppy calming collars set puppies up for success, helping them feel more confident when exploring the world and adapting to their new life. It works by mimicking calming "comforting messages" that mother dogs naturally release, called pheromones. The collar provides constant reassurance and is clinically proven to help your puppy settle into their new home faster, stop crying at night sooner, and stay calm and focused during training. Trusted by veterinarians and pet owners worldwide for over 15 years, more than 8 million dogs have benefitted from ADAPTIL dog calming products.