Calming pheromone collar: the Adaptil Calm On-The-Go Collar releases a synthetic copy of the natural dog appeasing pheromone (DAP) a mother dog releases to reassure her puppies, helping reduce stress and anxiety at home and out and about. Support wherever your dog goes: worn on your dog, the Adaptil collar helps provide calming support in common stressful situations such as walks, meeting new people, kennel stays and travelling. Adjustable and easy to use: the Adaptil On-The-Go Collar is adjustable, easy to use, non-irritating and a natural product. The drug-free pheromone works as well on adult dogs as it does on puppies, and this size is for medium and large dogs. Proven and trusted: Adaptil is clinically proven. Adaptil is vet recommended. Adaptil draws on over 2 decades of research and development into dog behaviour and stress relief. Adaptil is trusted and used by vets, charities and behaviourists. Which Adaptil to choose: the On-The-Go Collar is for out and about, the Calm Home Diffuser for triggers at home, Transport spray for travel and Calming Chews for fast acting support. Adaptil is non-drowsy and does not sedate your dog.