OK so... Jasper cat has had diarrhoea for months, vet cannot find a cause despite numerous tests...
Chunky puppy likes to eat cat poo...
Chunky puppy also likes to suckle on Zeus's penis...
Zeus got really sick with a bladder problem which has today been confirmed as E coli...
E coli causes diarrhoea in cats...
Hmmm... could I be on to something here... ? I will be speaking to the vet tomorrow!