The Beaphar CaniComfort 30 Day Refill should be used in combination with the Beaphar CaniComfort Calming Diffuser. This long-lasting plug-in provides continuous calming for nervous dogs. Using pheromone technology which is scientifically recognised for its calming effects it is ideal for reducing problem behavior in nervous dogs such as barking furniture destruction urinary marking excessive licking and scratching or general feelings of anxiety. It provides reassurance in stressful situations such as separation anxiety family gatherings fireworks and more.