I have a black lab, his stool goes back and forth from diarrhea and solid and sometimes has blood in it. We can't afford to take him to a vet. There are days that he won't drink anything, he eats fine, and is overweight. Does not eat much as far as people food, an occasional scrap here and there. Nothing I've been able to put my finger on if there is something he is getting in to. The last time he had this was about a month ago, it was more of a solid turd with mucus and blood. Smelled the same though, mucusy and diaretic. His energy level does not change much, he's kind of lazy. He was chasing the kids yesterday though, not sure if there is a connection. He is approximately 7 yrs old, and runs like a Clydesdale horse.