Proven to help comfort both puppies and adult dogs in challenging situations outside, the D.A.P. Collar is recommended:To help a rescue dog adjust to a new home and family To help dogs cope with novel and unpredictable situation away from the home To help dogs exhibiting fear related reactions outside the home when encountering traffic, other dogs, thunderstorms, gunshots etc. The D.A.P. Collar works by releasing a constant stream of synthetic dog appeasing pheromone for a period of about 4 weeks. The dog appeasing pheromone is a substance produced naturally by a lactating bitch to reassure and calm her puppies, as they explore and learn about the world around them. Importantly this pheromone is also proven to have a positive relaxing and comforting influence on adult dogs, increasing their confidence in the outside world and make the process of accepting new or difficult stimuli more relaxed and less challenging.