As I was reading over your posts, I too thought "Giardia", but maybe she has "Coccidia"...was the fecal checked for that? Can certainly cause stinky feces, diarrhea and occasionally blood in stool.
Certainly sounds like some sort of digestive upset if it's not parasites. Maybe probiotics would help? Hope you can find out sort what's causing this.
"We humans are indeed fortunate if we happen to be chosen to be owned by a cat." -- Anonymous