After all the double tests, and no one can find anything wrong, I settled it....I took Max off all meds, and changed food.....now he is back to near normal.....it's like I said all along, it's his sensitive stomach....all the junk they shoved down him made it worse. I also recently read an article where it said most miniature schnauzers have sensitive stomachs, they are born with it. Hopefully soon, we will be back to a normal life.