RAW based diet has come highly recommended.
As such, he was immediately transitioned over to RAW (ie rapid switch). Odds were he would accept the RAW immediately, and that it would help him out with his lil' GI issue.
Like the miracles of pumpkin for helping to ease over a dog's digestive issues (the use of basic ingredients sometimes has the most profound outcomes), a strict diet of RAW has brought it all back to baseline.
His stool since the change over to RAW (day one), as compared to the past two weeks of runs, has been transformational.