**Adaptil contains safety pheromones that make your dog feel safe, secure and calm in all situations.Pheromones are substances found naturally in all mammals. They are used to scentlessly communicate emotional states, such as whether they are threatening or friendly.A bitch that has just whelped emits special pheromones. Adaptil has copied this pheromone and can now be used by you to make your dog feel safe, calm down or give a little extra confidence when needed.Facts about Adaptil Collar:A collar with calming pheromones.Easily attaches and cuts to desired length.Ideal for transport, puppy training, veterinary visits or other situations where extra calm may be beneficial.The collar should be worn around the clock.Effective after about 1-2 hours and lasts for about 4 weeks.