Cat's hot tongue is grayish brown, so you can eat some drugs with heat-clearing and detoxification components. A cat's fever is actually an instinctive defensive response of the cat itself to external infection. Fever needs to be judged by a thermometer, which is the most accurate method. It can also be predicted according to the degree of dryness and wetness of the nose, but it is easily disturbed by external factors, so the best way is to measure the body temperature immediately. If the cat has a fever, it is recommended not to use antipyretics directly at first. Physical cooling can be used to reduce the fever first. See if the cat's temperature has dropped. If the body temperature still does not drop and continues to rise, it is recommended that the owner go to the nearest pet hospital at this time. Under the guidance of a doctor, give the cat an injection or take drugs containing flunixin meglumine, Radix Isatidis, Shuanghuanglian, Flos Lonicerae and other heat-clearing and detoxicating ingredients. It should be noted that adults can't feed cats at will, and they need to take them to the hospital for reasonable treatment and medication according to the doctor's advice.