It may be coccidial parasite infection in the body, feline distemper, enteritis and other diseases. In this case, it is impossible to judge by the naked eye. It is recommended to send the pet to a regular hospital for fecal examination, blood routine and other examinations. In addition, you can also check whether the cat's stool is dry. If the cat's stool is dry, it may also be blood and mucus caused by intestinal damage.