My old dog has been through trial and error the last three years. When we finally found this probiotic pro plan dry food to eat while having her raw feeding, we found a miracle. Of course all good things must come to an end. Purina has changed their formula and new look of the bag and now my dog can no longer eat it. She throws it up and it makes her very sick with yellow diarrhea. Most pet foods and medicines are severe with her, and her diarrhea does not just go away, it lasts for days, sometimes gone onto a little over a week and gets very weak from it. I like to have some dry to substitute her raw, it looks like I cannot longer do it. It is a shame.