I hate to be a party pooper (bad pun, I know) but I do want families with sick kitties to keep in the back of their minds that some of the causes can effect humans as well. Giardia can definitely sicken humans as poor Candys has reminded us. Tritrichomonas foetus is thought to be an unlikely cause of diarrhea in humans, but it can be transmitted. On the brighter side, coccidiosis in cats does not affect humans. And we all know about toxoplasmosis from cats. Let us all be diarrhea free!