*Faecal cytology may reveal red blood cells, occasional white blood cells, ''[[Clostridium species#C. perfringens type A|Clostridium perfringens]]'' spores or enterotoxin. ''[[Clostridium species#C. perfringens type A|Clostridium perfringens]]'' spores or enterotoxin can be found in a normal dog, therefore care has to be taken not to over-interpret this. | *Faecal cytology may reveal red blood cells, occasional white blood cells, ''[[Clostridium species#C. perfringens type A|Clostridium perfringens]]'' spores or enterotoxin. ''[[Clostridium species#C. perfringens type A|Clostridium perfringens]]'' spores or enterotoxin can be found in a normal dog, therefore care has to be taken not to over-interpret this. |