A little background here. We recently adopted a black cat with FIV called Bjorn. Not long after he got his second lot of vaccinations he started with terrible diarrhea. We went to a vet and got it treated (I can't remember the name, but it made helped form it into something less liquidy) Anyway, on the very last day of medicine we found blood in his Stool, which was primarily liquid. Panicking, we took him back to the vet who asked what brand we were on, told us it might be too rich for him and suggested a chicken only diet. Which we have done. That was Tuesday. It's now Friday morning, and aside from peeing he hasn't appeared to pass stool. Were out the house for roughly 10hrs so we don't know if he's trying when we aren't there, but he doesn't appear to need to when we are there. He still has an appetite and is still using his box for peeing. Has anyone else had this problem?