Say goodbye to your pup’s separation anxiety, fear of loud noises, or general anxiety with Tranquil Tails Pheromone Calming Diffuser for Dogs. This diffuser is specially designed to mimic natural calming signals, like those released by a mother to her offspring, providing your furry friend with much-needed relief. Available in unscented and three gentle fragrances, these refill pads (sold separately) can be used in the easy-open pad holders of the diffuser. You can even control the intensity of the scent by using one or two pads at a time. Plus, these pads have been tested to last for at least 24 hours, with many users reporting a calming effect for up to 72 hours. Use it all day, every day, or as needed to keep your furry family member calm and happy.