Cats infected with feline plague will suffer from listlessness, anorexia, intractable vomiting, yellow-green vomit, sticky secretions in the mouth, eyes and nose, and sticky feces. Pay special attention to when a cat has diarrhea, it means that it is in the advanced stage of the disease, with blood in its feces, severe dehydration, and anemia, which may lead to death in severe cases.