Sudden wilting in cats is mostly caused by diseases, which are mainly divided into mental aspects and physical aspects. If a cat lacks interaction with the outside world or its owner for a long time, it is at risk of suffering from depression, and will appear listless and unhappy. Willing to move, not interested in anything, but there is no abnormality in the body; and if the cat becomes wilted due to physical diseases, then there are many possibilities, such as colds, cat ringworm, gastroenteritis, and kidney failure. Etc., especially some infectious diseases that are acute and have severe symptoms, such as feline distemper, abdominal transmission from cats, etc., can even lead to death in dangerous cases. Therefore, if a cat is wilting, it is best to go to the pet hospital for examination in time.