D.A.P. Dog Appeasing Pheromone mimics the pheromone that the mother dog produces to calm and reassure her puppies. Dogs recognize these pheromones throughout life. It is an effective natural way to help dogs cope with new and fearful situations. Fit necks up to 15".Uses: D.A.P. Collar stays with your dog all the time to help control stressrelated behavior Introduction of new puppy Going on walks Thunderstorm season Fear of traveling Puppy socialization Boarding and grooming Fireworks and gunshotsInstructions for Use: Fasten the collar around your dog"s neck and adjust. Cut off the excess portion of the collar. The effets of one collar last up to 4 weeks. Combining the D.A.P. Collar with D.A.P. Diffuser indoors for stressrelated behavior achieves optimal results.Composition: Dog Appeasing Pheromone.......2.5 Inert ingredients.......97.5Caution: Remove the collar before bathing or shampooing your dog and replace it after the dog"s coat is dry. Collar will not release pheromone when wet. Do NOT use collar on dogs with extensive skin lesions. D.A.P. Collar is not a pharmaceutical product.