Beaphar CaniComfort Calming Diffuser is a simple and effective way of managing problem behaviour in dogs in times of stress, including barking, destructive behaviour, scent marking, licking and scratching. The diffuser works by excreting a copy of the naturally occurring 'Dog Appeasing Pheromone', which is released when bitches nurse their puppies. This gives off a continuous signal that the area is safe and calm. Particularly useful when bringing puppies home for the first time or for introducing new pets. The refill can be used anywhere in the house with the Beaphar CaniComfort Diffuser and will provide 30 days of continuous use.