Mother dogs communicate with their puppies through natural messages released into the air. These ""comforting messages"" are called Dog Appeasing Pheromones. These messages are only perceived by dogs and provide a strong signal of security and comfort to dogs of all ages, unlike humans or cats. ADAPTIL Junior delivers these ""comforting messages"" to ensure your puppy feel comfortable and secure with your family. During the settling down period, it can make your puppy be less fearful and more playful. In addition to helping puppies learn better during training classes, the collar also helps them develop into well-trained adult dogs. Also reassuring for adult dogs, the “comforting messages” sent by ADAPTIL allow dogs feel calm and relaxed in situations that may cause fear or anxiety.