NaturVet's Quiet Moments Herbal Calming Spray for Dogs is formulated with simulated canine pheromones to create a sense of safety and well being for pets in a room, vehicle or carrier. The effect is constantly comforting residual air effective for up to 8 to 10 hours. Pets feel they are in friendly, calm surroundings. Recommended for use in cars, crates and cages, kennels, new environments, dog houses and pet beds and to be used with Quiet Moments Calming Aid Tablets or Quiet Moments Soft Chews. NaturVet's Quiet Moments Herbal Calming Spray for Dogs is made in the USA and has a 100% Money Back Guarantee!