As many of you know, Aspen is on a PMR diet. On Tuesday the 23th he had a chix quarter for breakfast and a pretty big beef rib for dinner. He had another beef rib about a week before this incident with no problems. He pooped fine the next day, but then he went again that same day and it was soft serve and a light mud kind of color. We just got back from our jog, and he pooped a lot and it was part of it was almost diarrhea and part was firm, but also a muddy color. A bone heavy meal will probably take care of this but my question is, what could have caused it?