ALONE AT HOME? VISITORS? FEARS? Try an ADAPTIL Calm Home Diffuser to help your dog stay calm and adapt to stressful situations at home. HOW ADAPTIL WORKS: Mother dogs communicate with their puppies through natural messages released in the air. These "comforting messages", called dog appeg pheromones, provide a strong signal of security and comfort to dogs of all ages. ADAPTIL Calm On-the-go Collars send a copy of these messages to help your dog feel calm and confident in stressful situations. VETERINARIAN RECOMMENDED: Use an ADAPTIL Calm On-the-go Collar to help your dog feel calm and comforted during thunderstorms, fireworks, boarding, training and when facing fears outdoors. ADJUSTABLE: The ADAPTIL Large Collar fits dogs with necks between 32 and 62.5 cm (12.6 and 24.6 in), weighing up to approximately 50 kg (110 lb). EASY TO USE: Adjust the collar so it fits snugly around your dog's neck (collar is body heat activated). Keep the collar on your dog at all times. Replace every 4 weeks.