For Those Wondering, Pneumatic tubes for cats got shut down mainly because they caused stress and discomfort for the animals. While the idea of sending cats through air-powered tubes might seem fun or futuristic, the loud noises, sudden movements, and confined space can be frightening and even harmful to cats. Some cats refused to enter the tubes, while others showed signs of anxiety after using them. Animal welfare concerns grew, and many pet owners and experts agreed that the systems weren’t safe or kind to cats. Because of these risks and growing criticism, most of these tube systems were removed or shut down completely.