I see you wanted to make a list of culprit foods.
Purina Dog Chow. A green bag that says "Healthy Life Nutrition". I bought it because we are out of jobs and money. Halfway through the bag, she has a horrible allergy induced hot spot on her cheek.
I tried Taste of the Wild, Bison & Fish diets. Both made my 2 dogs sick. When I called the company they did not seem to care.
Regarding PurineONE Smartblend. I bought chicken and rice formula. One of my dogs would not touch it all and the other had diarrhea after eating it. I am going to trash the whole bag (cost $18), but something obviousy is not right with it. Bellalinda