Cat sneezing and diarrhoea but good spirits may be caused by:1 A cold or respiratory infection may cause the cat to sneeze. It is recommended to do a routine blood or nucleic acid test to confirm whether the infection is caused by mycoplasma, bacteria or a virus such as herpes that causes respiratory symptoms. bacteria secondary to a gastrointestinal reaction may also cause diarrhoea.2 Pre-infection with feline distemper virus, the symptoms may only be mild diarrhoea, and the spirit is not affected.3 Diseases such as gastroenteritis and pancreatitis can also cause diarrhoea in cats.
