Is your dog barking excessively, whining and hiding? These behaviors are likely caused by fear and anxiety. ADAPTIL is a clinically proven, drug-free solution that helps your dog feel calmer. ADAPTIL Calm On-The-Go Collar provides ?comforting messages? (dog appeasing pheromones) that helps dogs feel calm and relaxed in situations like loud noises (thunderstorms and fireworks), staying alone, traveling or other fearful situations. These odorless messages are only perceived by dogs and provide a strong signal of security and comfort. Cats and people are not affected. Large ADAPTIL collar is for dogs of all ages, weighing 36-110 lbs and should be used continuously for at least 1 month. Collar should be removed during grooming and bathing. #1 brand used and recommended by veterinarians. Clinically proven to work. Drug-free solution that helps reduce signs of fear and anxiety, like whining, hiding and excessive barking. Activated by body heat to provide constant reassurance for dogs indoors, outdoors or on-the-go. Fits dogs 36-110lbs, provides up to 4 weeks of support. 100% satisfaction guarantee.