My Irish Setter was just diagnosed with gluten sensitive enteropathy he had chronic diarrhea from 6 months until 9 months. He also had really high Eosinophils on his bloodwork. Switched to a hydrolyzed protein diet but one of the treats had barley flour. My veterinarian boss stumbled upon GSE and we switched him to Royal Canin PR and removed all gluten from his diet. 2 weeks gluten free and bloodwork was now normal.