Help control your dog's stress-related behaviors indoors or out with pheromone therapy she can wear. Adaptil Collars apply clinically proven synthetic calming canine pheromones directly on your dog and help control unpleasant behaviors including excessive barking, whining, trembling, hiding, panting, destroying household items, soiling in the house, and crying at night. Adaptil Collars adjust for a snug/custom fit and help curb your dog's stress response in situations such as separation anxiety, thunderstorms, fireworks, meeting new animals, and meeting new visitors. Activated by body heat, Adaptil collars release calming pheromones in your dog's immediate vicinity for up to 4 weeks. The synthetic Canine Appeasing Pheromone in these collars communicates a reassuring message to your dog, which helps curb or eliminate unwanted behaviors. An effective non-drug solution to helping your dog stay calmer and happier in challenging situations.