Animal Essentials Breathe EZ promotes clear, open airways and supports healthy respiration during normal exercise. This is formulated specifically for use in dogs and cats. All Animal Essentials tinctures are formulated by leading veterinarian's herbalists. These veterinarians are intimately familiar with the needs and sensitivities of cats and dogs. The herbs Animal Essentials uses are selected from only the highest quality, certified organic or wild-crafted sources found in North America. Animal Essentials' naturally balanced herbal blends have a sweet flavor that appeals to most dogs and cats.