CEVA Animal Health ADAPTIL Calm Home Diffuser for Dogs (30 Day Starter Kit) #1 brand used and recommended by veterinarians Clinically proven to work Drug-free solution that helps reduce signs of fear and anxiety, like whining, hiding and excessive barking Provides your dog with continuous and constant comfort. Starter kit includes one diffuser head and one vial that lasts up to 30 days 100% satisfaction guarantee