Vivid Humors on Instagram: "This video demonstrates a common physiological behavior observed in domestic felines during defecation. ​The Subject A domestic cat is shown in a state of intense physical concentration. The animal exhibits squinted eyes and a fixed facial expression, which are typical indicators of the physical strain required for bowel movements. ​The Mechanism This process involves the Valsalva maneuver, where the feline increases intra-abdominal pressure by exhaling against a clos