Feliway is a synthetic pheromone used to help your cat feel more relaxed at home. Pheromones are a type of chemical communication that all cats use to interact with each other and the world around them. These natural chemical messages are released from special glands around their bodies and are very safe. People and other animals are not affected by cat pheromones. Feliway MultiCat mimics the natural cat appeasing pheromones and it eases tensions by sending harmony messages to cats. These ‘harmony messages’ reduce issues such as fighting, hissing, chasing and other tensions.